1 # <a name="%WIKITOOLNAME% Site-Level Prefer"></a><a name=" %WIKITOOLNAME% Site-Level Prefe"></a> %WIKITOOLNAME% Site-Level Preferences
3 This topic defines **_site-level_** settings that apply to all users and webs on this [[TWikiSite]].
5 **_%X% Note:_** This topic should be regarded as read-only, so that upgrades can safely overwrite it without risk to your customizations.
7 Preference settings local to your site should be set in [[Main.TWikiPreferences|Main/TWikiPreferences]] (this topic is pointed to by \{LocalSitePreferences\}, which is set by the admin in the [configure](http://www.dementia.org/twiki/configure) interface). Settings in [[Main.TWikiPreferences|Main/TWikiPreferences]] will override settings in this topic, and should be used for defining custom settings and variables.
9 [[Read more|Main/TWikiVariables#PreferencesVariables]] on how to set Preferences Variables.
13 <li><a href="#Default Web Preferences"> Default Web Preferences</a></li>
14 <li><a href="#Default User Settings"> Default User Settings</a></li>
15 <li><a href="#TWiki Platform Settings"> TWiki Platform Settings</a><ul>
16 <li><a href="#Search Settings"> Search Settings</a></li>
17 <li><a href="#E-mail Settings"> E-mail Settings</a></li>
18 <li><a href="#HTTP-EQUIV Settings"> HTTP-EQUIV Settings</a></li>
21 <li><a href="#Skin Settings"> Skin Settings</a><ul>
22 <li><a href="#PatternSkin"> PatternSkin</a></li>
23 <li><a href="#Skin icons"> Skin icons</a></li>
24 <li><a href="#Legacy support"> Legacy support</a></li>
27 <li><a href="#Plugins Settings"> Plugins Settings</a></li>
28 <li><a href="#Rendering Shortcuts Settings"> Rendering Shortcuts Settings</a></li>
29 <li><a href="#Miscellaneous Settings"> Miscellaneous Settings</a></li>
30 <li><a href="#Access Control Settings"> Access Control Settings</a></li>
31 <li><a href="#Creating New Preference Variable"> Creating New Preference Variables</a></li>
32 <li><a href="#Protected System Settings"> Protected System Settings</a></li>
33 <li><a href="#Related Topics"> Related Topics</a></li>
37 <a name="DefaultWebPreferences"></a>
39 ## <a name="Default Web Preferences"></a> Default Web Preferences
41 %X% **NOTE:** These are just defaults; don't change them here. Instead, add them to the WebPreferences topic in each web
43 - List of selected topics in a web (used in menus)
44 - Set WEBTOPICLIST = [[Changes|Main/WebChanges]] | [[Index|Main/WebIndex]] | [[Search|Main/WebSearch]] | Go <input name="topic" size="16" type="text" />
46 - Web-specific background color: (is overwritten by web preferences)
47 - Set WEBBGCOLOR = #FFD8AA
49 - [favicon](http://en.wikipedia.org/wiki/Favicon): Attach a `favicon.ico` to a web's [[WebPreferences]] or add a `FAVICON` setting to [[WebPreferences]]
50 - Set FAVICON = <http://www.dementia.org/twiki//view/Main/WebPreferences/favicon.ico>
52 - Image, URL and alternate tooltip text of web's logo.
53 - Set WEBLOGOIMG = %WIKILOGOIMG%
54 - Set WEBLOGOURL = %WIKILOGOURL%
55 - Set WEBLOGOALT = %WIKILOGOALT%
57 - List this web in the %SYSTEMWEB%.SiteMap:
58 - If yes, set SITEMAPLIST to `on`, do not set NOSEARCHALL, and add the "what" and "use to..." description for the site map. Make sure to list only links that include the name of the web, e.g. %WEB%.Topic links.
59 - Set SITEMAPLIST = on
60 - Set SITEMAPWHAT = Describe what this web does.
61 - Set SITEMAPUSETO = ...to do something.
64 - Set WEBCOPYRIGHT = <span> [<img src="http://www.dementia.org/twiki//view/%SYSTEMWEB%/TWikiLogos/T-badge-88x31.gif" width="88" height="31" alt="This site is powered by the TWiki collaboration platform" title="This site is powered by the TWiki collaboration platform" />](http://twiki.org/)</span>Copyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors. <br /> Ideas, requests, problems regarding %WIKITOOLNAME%? [Send feedback](mailto:?subject=%WIKITOOLNAME%%20Feedback%20on%20Main.WebHome)
66 - Simplified Copyright notice for the [[WebRss]] feed (don't use any special characters, html tags, entities, wiki markup or [[WikiWords]])
67 - Set WEBRSSCOPYRIGHT = Copyright 2010 by contributing authors
69 - Exclude web from a `web="all"` search: (Set to `on` for hidden webs; is overwritten by web preferences) **_Note_** it is much better to use [[TWikiAccessControls]] in individual webs to control who can and can't view the contents of a web. NOSEARCHALL is retained for compatibility, but you should avoid using it.
71 - Prevent automatic linking of [[WikiWords]] and acronyms (if set to `on`); link WikiWords (if empty); can be overwritten by web preferences:
73 - **_Note:_** Use the `[[...][...]]` syntax to link topics in case you disabled WikiWord linking. The `<noautolink> ... </noautolink>` syntax can be used to prevents links within a block of text.
74 - If you use non WikiWords for topic names (for example "Expenses" or "Mighty1") and if you use bracket notation to link to those topics, it is useful to **turn of all warnings** (like: "WARNING: This topic name is not recommended because it will not be linked automatically") and checkboxes ("Allow non WikiWord for the new topic name"). Can be overwritten by web preferences. Set to `on` to activate:
75 - Set HIDE\_NON\_WIKI\_WORD\_WARNINGS =
77 - Warn if `%INCLUDE{}%` of topic fails: Fail silently if empty or `off`. Output warning message (defined in templates/oopsalerts.tmpl) if set to `on`. Otherwise output specific text (use `$topic` for topic). You can override this in web preferences, or by using a `warn="..."` parameter with `%INCLUDE{}%` :
78 - Set INCLUDEWARNING = on
80 - Generated Table of Contents (TOC) settings
81 - The first header level to appear in the TOC:
82 - Set TOC\_MIN\_DEPTH =
84 - Possible values: `1` to `6`
85 - The last header level to appear in the TOC:
86 - Set TOC\_MAX\_DEPTH =
88 - Possible values: `1` to `6`
89 - Can be overridden by `depth` parameter of [[variable TOC|SYSTEMWEB/VarTOC2]]
90 - The default TOC title:
93 - Possible values: any string, for example `On this page:`
94 - Can be overridden by `title` parameter of [[variable TOC|SYSTEMWEB/VarTOC2]]
95 - Do not show a TOC if the topic it contains is included in another topic:
96 - Set TOC\_HIDE\_IF\_INCLUDED =
97 - If not set: included TOC is shown
98 - Possible values: `on` or nothing
100 ## <a name="Default User Settings"></a> Default User Settings
102 %X% **NOTE:** They are typically redefined in topics of individual %USERSWEB%.TWikiUsers
104 - Show tool-tip topic info on mouse-over of [[WikiWord]] links. Setting can be on, off, or customized. An empty setting or off setting disables the tool-tips (for better performance). The setting can contain $summary to show the topic summary, $date for the last change date, $rev for the revision, $username for the login name of the last editor, $wikiname for the WikiName, $wikiusername for %USERSWEB%.WikiName, $topic for the topic name, and $web for the web name
105 - Set LINKTOOLTIPINFO = off
106 - #Set LINKTOOLTIPINFO = $username - $date - $rev: $summary
108 - Horizontal size of text edit box: (can be overwritten by user preferences)
109 - Set EDITBOXWIDTH = 70
111 - Vertical size of text edit box: (can be overwritten by user preferences)
112 - Set EDITBOXHEIGHT = 22
114 - Style of text edit box. Set to `width: 99%` for full window width (default; this will overwrite the EDITBOXWIDTH setting), or `width: auto` to disable. This setting works for IE and some other recent browsers. (can be overwritten by user preferences)
115 - Set EDITBOXSTYLE = width:99%
117 - Default state of the **_Force New Revision_** ([[ForceNewRevision]]) check box in preview. Check box is initially checked if `Set FORCENEWREVISIONCHECKBOX = checked="checked"`, or unchecked if empty: (can be overwritten by user preferences)
118 - Set FORCENEWREVISIONCHECKBOX =
120 - Default state of the **_Minor Changes, Don't Notify_** ([[DontNotify]]) check box in preview. Check box is initially checked if `Set DONTNOTIFYCHECKBOX = checked="checked"`, or unchecked if empty: (can be overwritten by user preferences)
121 - Set DONTNOTIFYCHECKBOX =
123 - Default state of the **_link_** check box in the attach file page. Checkbox is initially checked if `Set ATTACHLINKBOX = checked="checked"`, or unchecked if empty (`Set ATTACHLINKBOX =`). If checked, a link is created to the attached file at the end of the topic: (can be overwritten by user preferences)
124 - Set ATTACHLINKBOX =
126 - Format of file link when the **_link_** check box is checked: (can be overwritten by user preferences)
127 - %H% **NOTE:** Keyword <code>**$name**</code> gets expanded to filename; <code>**$comment**</code> to comment; <code>**\\t**</code> to tab (3 spaces for bullets).
129 * Set ATTACHEDFILELINKFORMAT = \n * [[%ATTACHURL%/$name][$name]]: $comment
131 - Format of images when the **_link_** check box is checked: (can be overwritten by user preferences)
132 - %H% **NOTE:** Keyword <code>**$name**</code> gets expanded to filename; <code>**$comment**</code> to comment; <code>**$size**</code> to <code>**width="..." height="..."**</code> attribute of <code>**img**</code> tag; <code>**\\t**</code> to tab and <code>**\\n**</code> to linefeed (3 spaces for bullets).
134 * Set ATTACHEDIMAGEFORMAT = \n * $comment: <br />\n <img src="%ATTACHURLPATH%/$name" alt="$name" $size />
136 ## <a name="TWiki Platform Settings"></a> TWiki Platform Settings
139 - Set WIKITOOLNAME = TWiki
141 - Image, URL and alternate tooltip text of the logo **for this installation**: you should change these settings for your site, or they can be overwridden in WebPreferences for individual webs by defining these variables there.
142 - Set WIKILOGOIMG = ![T-logo-140x40-t.gif](http://www.dementia.org/twiki//view/%SYSTEMWEB%/TWikiLogos/T-logo-140x40-t.gif)
143 - Set WIKILOGOURL = <http://TWiki.org/>
144 - Set WIKILOGOALT = Powered by %WIKITOOLNAME%
146 - Home page of this site
147 - Set WIKIHOMEURL = <http://www.dementia.org/twiki/view>
149 - List of %WIKITOOLNAME% webs - on the first line of the upper toolbar (to add a new web, see [[ManagingWebs]] and %SYSTEMWEB%.SiteMap):
150 - Set WIKIWEBLIST = [[%USERSWEB%|USERSWEB/WebHome]] | [[%SYSTEMWEB%|SYSTEMWEB/WebHome]] | [[Sandbox|Sandbox/WebHome]]
151 - %T% **NOTE:** To automatically list all non-hidden webs in alphabetical order, use the `%WEBLIST{}%` variable instead: <br />
153 - Maximum size of %SYSTEMWEB%.FileAttachments in KB, 0 for no limit:
154 - Set ATTACHFILESIZELIMIT = 10000
156 - Broadcast message for skins supporting a %BROADCASTMESSAGE% at the top of the page: (IMPORTANT: Set to empty message if not used; #Comment out unused messages)
157 - Set BROADCASTMESSAGE =
158 - #Set BROADCASTMESSAGE = **NOTE:** Edit and Attach will be disabled today between 05:00 PM and 06:00 PM PDT (00:00 to 01:00 GMT) for a scheduled %WIKITOOLNAME% maintenance.
160 - Users or groups allowed to [[create new top-level webs|SYSTEMWEB/ManagingWebs]]: (ex: %USERSWEB%.WebCreatorsGroup). If set to nothing, only administrators will be able to do this.
161 - Set ALLOWROOTCHANGE = %USERSWEB%.TWikiAdminGroup
163 ### <a name="Search Settings"></a> Search Settings
165 - Default type for search, one of: keyword (for search engine like syntax), regex (for [[RegularExpression]] search), or literal (for verbatim search)
166 - Set SEARCHDEFAULTTYPE = keyword
167 - Default for `%SEARCH{}%` variable, one of: keyword, regex, or literal
168 - Set SEARCHVARDEFAULTTYPE = literal
169 - Stop words, e.g., common words and characters to exclude from a keyword search:
170 - Set SEARCHSTOPWORDS = a, all, am, an, and, any, as, at, b, be, by, c, d, e, for, from, g, h, how, i, i'm, i.e., in, is, isn't, it, it's, its, j, k, l, m, n, o, of, on, or, p, q, r, s, t, that, that's, the, this, to, u, v, w, was, wasn't, what, what's, when, where, who, who's, will, with, x, y, z
172 ### <a name="E-mail Settings"></a> E-mail Settings
174 - 'Mail this topic' mailto: link - can be included in topics, templates or skins
175 - Set MAILTHISTOPIC = [%MAILTHISTOPICTEXT%](mailto:?subject=WebHome&body=%TOPICURL%)
177 - 'Mail this topic' link text
178 - Set MAILTHISTOPICTEXT = Send a link to this page
180 - URL for current topic
181 - Set TOPICURL = [[http://www.dementia.org/twiki/view/%WEB%/WebHome|%WEB%/WebHome]]
183 ### <a name="HTTP-EQUIV Settings"></a> HTTP-EQUIV Settings
185 - %T% **NOTE:** Changing cache behaviour with these settings should not be necessary and may cause cache-related problems (e.g. TWiki:Codev.BackFromPreviewLosesText or TWiki:Codev.RefreshEditPage). These settings do not affect proxy caches.
186 - **NOTE:** The current values of these preferences are not displayed in view mode (values are `<link>`-tags).
188 - <code>**http-equiv**</code> meta tags for <code>**view**</code>, <code>**rdiff**</code>, <code>**attach**</code>, <code>**search\***</code> scripts:
189 - #Set HTTP\_EQUIV\_ON\_VIEW =
190 - Set HTTP\_EQUIV\_ON\_VIEW =
192 - <code>**http-equiv**</code> meta tags for <code>**edit**</code> script:
193 - Set HTTP\_EQUIV\_ON\_EDIT =
195 - <code>**http-equiv**</code> meta tags for <code>**preview**</code> script:
196 - Set HTTP\_EQUIV\_ON\_PREVIEW =
198 ## <a name="Skin Settings"></a> Skin Settings
200 - Skin overriding the default TWiki templates: (can be overwritten by [[WebPreferences]] and user preferences)
203 - **_Note:_** See [[TWikiSkinBrowser]] for currently installed skins
205 ### <a name="PatternSkin"></a> [[PatternSkin]]
207 - Default TWiki styles
208 - Set TWIKILAYOUTURL = <http://www.dementia.org/twiki//view/%SYSTEMWEB%/PatternSkin/layout.css>
209 - Set TWIKISTYLEURL = <http://www.dementia.org/twiki//view/%SYSTEMWEB%/PatternSkin/style.css>
210 - Set TWIKICOLORSURL = <http://www.dementia.org/twiki//view/%SYSTEMWEB%/PatternSkin/colors.css>
212 - Custom overriding styles (enabled pr. default but empty, to prevent browsers from fetching %USERLAYOUTURL%-style URLs)
213 - Set USERLAYOUTURL =
215 - Set USERCOLORSURL =
217 - **PatternSkin header settings**
218 - Set WEBHEADERART = ![TWiki\_header.gif](http://www.dementia.org/twiki//view/%SYSTEMWEB%/PatternSkin/TWiki_header.gif)
219 - #Set WEBHEADERBGCOLOR = #faf8f0
221 ### <a name="Skin icons"></a> Skin icons
223 - Topic containing the icon graphics library. Icons can easily be rendered with `%ICON{name}%`.
224 - Set ICONTOPIC = %SYSTEMWEB%.TWikiDocGraphics
226 ### <a name="Legacy support"></a> Legacy support
228 - Support for legacy "EDITTOPIC", used to be hard-coded, now replaced by TMPL:P conditional instantiation
229 - Set EDITURL = <http://www.dementia.org/twiki/edit/%WEB%/%TOPIC%?t=1277828060>
230 - Set EDITTOPIC = [Edit](%EDITURL% Edit Topic - deprecated usage - please see release notes)
232 ## <a name="Plugins Settings"></a> Plugins Settings
234 - You can enable/disable Plugins using the [configure](http://www.dementia.org/twiki/configure) interface.
235 - You can also disable installed plugins in individual webs/topics by defining the %DISABLEDPLUGINS% TWiki variable to be a list of plugins to disable e.g.
236 - Set DISABLEDPLUGINS = [[SpreadSheetPlugin]],EditTablePlugin
237 - Currently, %DISABLEDPLUGINS% is set to "%DISABLEDPLUGINS%"
238 - Currently activated Plugins: [[SpreadSheetPlugin]], [[CommentPlugin]], [[EditTablePlugin]], [[InterwikiPlugin]], [[PreferencesPlugin]], [[SlideShowPlugin]], [[SmiliesPlugin]], [[TablePlugin]], [[TwistyPlugin]]
240 - %T% **NOTE:** You can enable/disable Plugins by passing a comma-separated list of Plugin names in the `debugenableplugins` url parameter; for example, [[http://www.dementia.org/twiki/view/%WEB%/%TOPIC%?debugenableplugins=SmiliesPlugin|%WEB%/%TOPIC%?debugenableplugins=SmiliesPlugin]] will display this topic with all Plugins disabled except the [[SmiliesPlugin]].
241 - Detailed diagnostics can be found in [[InstalledPlugins]]
243 - Set INSTALLEDPLUGINS = The INSTALLEDPLUGINS variable is no longer supported. You can set the Plugins execution order using the [configure](http://www.dementia.org/twiki/configure) interface.
245 <a name="RenderingShortcuts"></a>
247 ## <a name="Rendering Shortcuts Settings"></a> Rendering Shortcuts Settings
249 - Line break: Note that the setting has an intentional trailing space
255 - Vertical bar / pipe symbol:
258 - Vertical caret symbol:
261 - Line break and bullet with different levels of indentation:
267 - **_Hint:_** Above shortcuts are useful in TWiki tables where you cannot use newlines
269 <a name="DocGraphics"></a>
271 - Graphics used in TWiki documentation - view all images in %ICONTOPIC%. _(There are various ways to set up common icons as text variables. This is simply one quick approach.)_:
272 - Set H = <img src="http://www.dementia.org/twiki//view/Main/WebHome/help.gif" width="16" height="16" alt="HELP" title="HELP" />
273 - Set I = <img src="http://www.dementia.org/twiki//view/Main/WebHome/tip.gif" width="16" height="16" alt="IDEA!" title="IDEA!" />
274 - Set M = <img src="http://www.dementia.org/twiki//view/Main/WebHome/arrowright.gif" width="16" height="16" alt="MOVED TO..." title="MOVED TO..." />
275 - Set N = <img src="http://www.dementia.org/twiki//view/Main/WebHome/new.gif" width="30" height="16" alt="NEW" title="NEW" />
276 - Set P = <img src="http://www.dementia.org/twiki//view/Main/WebHome/pencil.gif" width="16" height="16" alt="REFACTOR" title="REFACTOR" />
277 - Set Q = <img src="http://www.dementia.org/twiki//view/Main/WebHome/help.gif" width="16" height="16" alt="QUESTION?" title="QUESTION?" />
278 - Set S = <img src="http://www.dementia.org/twiki//view/Main/WebHome/starred.gif" width="16" height="16" alt="PICK" title="PICK" />
279 - Set T = <img src="http://www.dementia.org/twiki//view/Main/WebHome/tip.gif" width="16" height="16" alt="TIP" title="TIP" />
280 - Set U = <img src="http://www.dementia.org/twiki//view/Main/WebHome/updated.gif" width="55" height="16" alt="UPDATED" title="UPDATED" />
281 - Set X = <img src="http://www.dementia.org/twiki//view/Main/WebHome/warning.gif" width="16" height="16" alt="ALERT!" title="ALERT!" />
282 - Set Y = <img src="http://www.dementia.org/twiki//view/Main/WebHome/choice-yes.gif" width="16" height="16" alt="DONE" title="DONE" />
284 - Colored text: (see more [[StandardColors]]) <table border="1" cellpadding="0" cellspacing="0">
287 <td><code>%RED% red text %ENDCOLOR% and %GREEN% green text %ENDCOLOR%</code></td>
291 <td> %RED% red text %ENDCOLOR% and %GREEN% green text %ENDCOLOR% </td>
294 - **_Note:_** `%<color>%` text must end with `%ENDCOLOR%`. If you want to switch from one color to another one you first need to end the active color with `%ENDCOLOR%`, e.g. write `%RED% some text %ENDCOLOR% %GREEN% more text %ENDCOLOR%`.
295 - %YELLOW% **Set YELLOW = looks like this** %ENDCOLOR%
296 - %ORANGE% **Set ORANGE = looks like this** %ENDCOLOR%
297 - %RED% **Set RED = looks like this** %ENDCOLOR%
298 - %PINK% **Set PINK = looks like this** %ENDCOLOR%
299 - %PURPLE% **Set PURPLE = looks like this** %ENDCOLOR%
300 - %TEAL% **Set TEAL = looks like this** %ENDCOLOR%
301 - %NAVY% **Set NAVY = looks like this** %ENDCOLOR%
302 - %BLUE% **Set BLUE = looks like this** %ENDCOLOR%
303 - %AQUA% **Set AQUA = looks like this** %ENDCOLOR%
304 - %LIME% **Set LIME = looks like this** %ENDCOLOR%
305 - %GREEN% **Set GREEN = looks like this** %ENDCOLOR%
306 - %OLIVE% **Set OLIVE = looks like this** %ENDCOLOR%
307 - %MAROON% **Set MAROON = looks like this** %ENDCOLOR%
308 - %BROWN% **Set BROWN = looks like this** %ENDCOLOR%
309 - %BLACK% **Set BLACK = looks like this** %ENDCOLOR%
310 - %GRAY% **Set GRAY = looks like this** %ENDCOLOR%
311 - %SILVER% **Set SILVER = looks like this** %ENDCOLOR%
312 - <span>%WHITE% **Set WHITE = looks like this (with gray background)** %ENDCOLOR%</span>
313 - The following color settings are enclosed in verbatim tags to avoid incorrect nesting of XHTML tags:
315 * Set YELLOW = <font color="#ffff00">
316 * Set ORANGE = <font color="#ff6600">
317 * Set RED = <font color="#ff0000">
318 * Set PINK = <font color="#ff00ff">
319 * Set PURPLE = <font color="#800080">
320 * Set TEAL = <font color="#008080">
321 * Set NAVY = <font color="#000080">
322 * Set BLUE = <font color="#0000ff">
323 * Set AQUA = <font color="#00ffff">
324 * Set LIME = <font color="#00ff00">
325 * Set GREEN = <font color="#008000">
326 * Set OLIVE = <font color="#808000">
327 * Set MAROON = <font color="#800000">
328 * Set BROWN = <font color="#996633">
329 * Set BLACK = <font color="#000000">
330 * Set GRAY = <font color="#808080">
331 * Set SILVER = <font color="#c0c0c0">
332 * Set WHITE = <font color="#ffffff">
333 * Set ENDCOLOR = </font>
335 ## <a name="Miscellaneous Settings"></a> Miscellaneous Settings
337 - Format of a [[NewWikiWord]] link:
338 - Note that `$text` is the topic link text, `$topic` is the name of the new topic, and `$web` is the name of the web for the new topic. Values for the 3 are taken from the link syntax `[[$web.$topic][$text]]`. For normal plain WikiWord links `$text` and `$topic` are the same. The value of `$web` is the current web unless the link is in the format `$web.$topic`.
340 - Set NEWLINKFORMAT = <span>[$text](http://www.dementia.org/twiki/edit/$web/$topic?topicparent=%WEB%.%TOPIC% $text (this topic does not yet exist; you can create it))</span>
341 - alternative setting:
342 - #Set NEWLINKFORMAT = [$text](http://www.dementia.org/twiki/edit/$web/$topic?topicparent=%WEB%.%TOPIC% Create this topic)
344 - %SYSTEMWEB%.PreviewBackground image:
345 - Set PREVIEWBGIMAGE = ![preview2bg.gif](http://www.dementia.org/twiki//view/%SYSTEMWEB%/PreviewBackground/preview2bg.gif)
347 - User-friendly synonyms for system webs
348 - Set DOCWEB = %SYSTEMWEB%
350 - show extra help for ApacheLogin users for [[TWikiAdminUser]] login
351 - Set ADMINLOGIN = [internal admin login](http://www.dementia.org/twiki/login?sudo=sudo;origurl=http://www.dementia.org/twiki/view/Main/WebHome) (use the username suggested and the password set in configure).
353 ## <a name="Access Control Settings"></a> Access Control Settings
355 - No-one (except admins) should change this topic
356 - Set ALLOWTOPICCHANGE = %USERSWEB%.TWikiAdminGroup
357 - Set ALLOWTOPICRENAME = %USERSWEB%.TWikiAdminGroup
359 ## <a name="Creating New Preference Variable"></a> Creating New Preference Variables
361 You can introduce new VARIABLES and use them in your topics and templates. There is no need to change the TWiki engine (Perl scripts).
363 - A preference is defined in a [[TWikiShorthand]] bullet item: <code>**[3 spaces] \* [space] Set NAME = value**</code><br /> Example (as a nested bullet item, indented 6 spaces):
364 - Set WEBBGCOLOR = #FFFFC0
365 - Preferences are used as %SYSTEMWEB%.TWikiVariables by enclosing the name in percent signs: <code>**%**</code>. Example:
366 - When you write variable <code>**%WEBBGCOLOR%**</code>, it gets expanded to `%WEBBGCOLOR%` .
368 - %X% The sequential order of the preference settings is significant. Define preferences that use other preferences FIRST. For example, set <code>**WEBCOPYRIGHT**</code> before <code>**WIKIWEBMASTER**</code> since the copyright notice uses the TWiki administrator e-mail address.
369 - %X% In order to protect your custom variables from being overwritten when upgrading the [[%SYSTEMWEB%.%TOPIC%|SYSTEMWEB/TOPIC]] topic, it is recommended that custom variables are defined in [[%USERSWEB%.%TOPIC%|USERSWEB/TOPIC]].
371 ## <a name="Protected System Settings"></a> Protected System Settings
373 The following settings are declared final to protect them as read only. These are system variables that should never be attempted set or altered in any preference topic or topic settings.
375 - Set FINALPREFERENCES = WEB, TOPIC
377 ## <a name="Related Topics"></a> Related Topics
379 - [[WebPreferences]] has preferences of the %WEB% web.
380 - User topics in %USERSWEB% can have optional user preferences.
381 - %SYSTEMWEB%.TWikiVariables has a list of common `%VARIABLES%`.
382 - %SYSTEMWEB%.TWikiAccessControl explains how to restrict access by users or groups.
383 - TWiki:Plugins.PreferencesPlugin makes editing preferences a snap.
385 **_Note_**: Can't edit? [[View raw topic|%WEB%/%TOPIC%?raw=on]]