Scid allows you to bookmark important games for easy future reference. [TheBookmarksList] is available from the [File] menu, the toolbar, or the Ctrl+B shortcut key.
When you select a bookmarked game from [TheBookmarksList], Scid will open its database if necessary, find that game, and move to the game position at which it was bookmarked.
Only games in a Scid format database (not a PGN file or [TheClipbase]) can be bookmarked.
With [TheBookmarkEditor], you can change the menu text displayed for each bookmarked game and add folders to categorize bookmarks.
See [TipForBookmarking].
Yes. [TheBookmarksList] contains an entry for controlling the display of bookmark folders: they can be shown as submenus (useful when there are many bookmarks), or as a single list.