The Windows Menu looks like this:
Selecting a window opens (or closes) it. Open windows have a check mark next to them. In the screenshot above, [TheCommentEditor], [ThePgnWindow], and [TheTreeWindow] are open.
Here are the available windows in that menu, with a short (forthcoming) description of what they offer:
[TheDatabaseSwitcher] lets you switch to another database or copy games between databases easily
[TheStatisticsWindow] which gives a win/loss summary of the games in [TheFilter].
For more general questions on windows, v. [AboutScidWindows].
Wiki: AboutScidWindows
Wiki: Menus
Wiki: TheCommentEditor
Wiki: TheDatabaseSwitcher
Wiki: TheFilter
Wiki: ThePgnWindow
Wiki: TheTablebaseWindow
Wiki: TheTournamentFinder
Wiki: TheTreeWindow