The Character Sheet Tab is a new feature making it's debut in version 5.13.2. The Character Sheet Tab is similar to the Preview tab and it's purpose is the same: to display your characters information. The difference between the Preview Tab and the Character Sheet Tab is that the Preview Tabs layout is coded in java and can't be adjusted except by editing the code and recompiling the program. The Character Sheet Tab uses html to render its display, this means that the sheets can be edited with a text editor while the program is running and they can be created and altered by anyone with a little knowledge of html and OS tokens. The html output sheets used for output can be used in the Character Sheet Tab, in fact most of the sheets available are simply duplicates of the output sheets.
Changes made to the character in PCGen are updated automatically in the Character Sheet Tab at the time you make them. So, for example, if you were to apply the Rage bonuses from the Temporary Bonus Tab you would see these changes applied to your character when you returned to the Character Sheet Tab.
The Character Sheet Tab has an additional pane on the right which can be accessed by clicking the arrow along the vertical border of the window. This pane displays the Character Sheet selection menu, the Equipsets and a list of temporary bonuses which have been applied to the PC. The Character Sheet selection menu enables you to select a sheet from a list of sheets available for the currently active gameMode. The radio button beside each Equipset indicates which Equipset is currently being applied to the PC and displayed in the Character Sheet Tab. You can switch to another Equipset by simply clicking on the corresponding radio button. Each temporary bonus has a check box on it's left which indicate if it is active or not. Temporary bonuses can be switched off and on with the check box which will update the output of the Character Sheet tab.
All the sheets used by the Character Sheet Tab can be found in the pcgen/preview directory. Each gameMode has a specific directory of sheets which is set in the gameModes miscinfo.lst file with the PREVIEWDIR tag. Each gameMode also has a default sheet set by the PREVIEWSHEET miscinfo.lst file.
Character Sheets can contain images, the paths to the images must use the pcgen directory as its root.
Character Sheets can utilize Javascript. Check out the preview.html sheet for examples of what can be accomplished by javascript savvy coders.