If you want to learn how to create your own look or skin based on PatternSkin, read further in PatternSkin.
Naming conventions
All PatternSkin specific classes have the prefix pattern: patternEditPage, patternTopicAction, etcetera.
TWiki specific classes (emitted by the TWiki engine) have the prefix twiki: twikiButton, twikiToc, etcetera. See for a complete list TWikiCss.
Positional containers are referred by id, for instance #patternLeftBar.
Namespaces
PatternSkin uses namespaces for templates, by adding one (sometimes two - multiple) class names to the template's body tag.
The body tag in view.pattern.tmpl for instance has the class name "patternViewPage": <body class="patternViewPage">. All CSS elements specific to the view template thus can be defined as .patternViewPage .someClassName.
All templates that are not the view template have the body class name "patternNoViewPage". That makes it easy to give all of these pages a different layout in one sweep (smaller or wider margins for instance). Template edit.pattern.tmpl uses <body class="patternNoViewPage patternEditPage">.
Page type classes
.patternViewPage
.patternViewPage .patternPrintPage
.patternNoViewPage
.patternNoViewPage .patternEditPage
.patternNoViewPage .patternAttachPage
.patternNoViewPage .patternChangeFormPage
.patternNoViewPage .patternDiffPage
.patternNoViewPage .patternRenamePage
.patternSearchResultsPage
.patternPlainPage (viewplain.pattern.tmpl)
Layout classes
Main layout elements (in order of appearance in body.pattern.tmpl)
#patternMainContents - holder of patternTop, patternTopic, twikiForm, twikiAttachments, etc.
#patternTopBar - top bar area
#patternTopBarContents - header art / logo; contains topic WebTopBar
#patternBottomBar - bottom bar area
#patternBottomBarContents - copyright
Style classes
View
.patternContent - container around .patternTopic in view.pattern.tmpl only; to be able to give .twikiAttachments and .twikiForm a different appearance when they are not enclosed by it, for example the personal data form on the user pages (where the user form is positioned outside, above the topic text)
.patternTopBarLogo - logo position in patternTopBar (topic WebTopBar)
.patternTopBarOverlay - striped white image background
.patternTopic - TWiki topic text
.patternTop - area at top of topic text, with patternHomePath, revision and action buttons
.patternTopicActions - container for multiple .patternTopicAction rows
.patternTopicAction - container for .patternActionButtons
.patternActionButtons - action buttons at bottom of page
.patternMoved - topic moved info (only visible when the topic has changed name or web)
.patternWebIndicator - colored block at the top of the left bar to indicate the current web
.patternFormHolder - container around form to manage the size of form elements
.patternLeftBarPersonal - block of personal links (included topic %MAINWEB%.%USERNAME%LeftBar)
.patternHomePath - breadcrumb at top
.patternHomePathTitle - "You are here" text
.patternRevInfo - revision info and author name
.patternToolBar - holder for .patternToolBarButtons
.patternToolBarButtons - action buttons at top of page
.patternToolBarBottom - seperator
.patternSimpleLogo - logo used on 'simple' pages like the login screen
.patternButton - tab button Edit, Attach, Printable at top of topic
.patternMetaMenu - search box, jump box, language selector
Edit
.patternSig - signature copy box
.patternSaveOptions - holder for .patternSaveOptionsContents
.patternSaveOptionsContents - checkboxes that change the state of a topic save; for instance "Force revision" checkbox
.patternSaveHelp - info block with help on save options (access keys and potentially other info)
Preview page
.patternPreviewArea - container around preview of .patternTopic
Attach page
.patternPrevious - attachment table of previous versions
.patternMoveAttachment - container for "Move or Delete attachment"
.patternAttachForm
Rename (rename, move, delete)
patternRenameOptionsList - list of topics that can be updated
More
patternDiffOptions - row of revision options under "Compare revisions"
Search results
.patternSearchResults - container on rename pages (no longer used on actual search results 'view' pages)
.patternSearchResultsHeader - horizontal bar with the web color
.patternSearchResults - block of one result
.patternSearchResultCount - the number of results
.patternSearched - feedback on the string used to search