You can see the Sqliteman user interface is quite similar to classic database admin/developer tools. The main window contains Object Browser, SQL Editor, Data Result Grid, and many more tools for Sqlite special features.

All interface buttons have so called "tool tips" – quick notes which are available when you hover the mouse cursor over the button area for a while. Buttons and some menu items have shortcut keys to invoke their functions. Menu shortcuts are Ctrl+<something>, apart from Help which follows the normal convention of the F1 key. Shortcuts to buttons for the SQL editor are function keys or Ctrl+Shift+<something>. Shortcuts to buttons for the Dataviewer are Ctrl+Alt+<something>. Editing shortcuts in Dataviewer items are Ctrl+<something> or Ctrl+Alt+<something> where necessary to avoid ambiguity. Ctrl+C, Ctrl+V, and Ctrl+A have their usual meanings of Copy, Paste, and Select All wherever relevant: these also appear in the context menus.
All Ssqliteman windows remember their dimensions between invocations of sqliteman. If you change the size of a window, it will always reappear with the last size that you set it to unless your window manager overrides this behaviour.