Docs: Level Editor general stuff

docs/level_editor/level_editor.rst

@@ -26,4 +26,30 @@ Number Name                    What it shows
 6      Menubar                 Common commands for editing / debugging / opening editors etc.
 7      Toolbar                 Tools and common options for editing.
 8      Statusbar               Contextual info and small self-contained messages.
+9      Titlebar                Start/Stop Level button, current level name and edit status.
 ====== ======================= =============
+
+Layout customization
+====================
+
+Most panels are optional and can be toggled from the ``View`` menu in the
+Menubar.
+
+The Console can be shown or hidden quickly with the ``Ctrl+``` shortcut. Use
+the same shortcut to jump to the Command Bar in the Console.
+
+Running the game
+================
+
+Press ``F5`` to play the currently edited level. Crown saves a copy of the
+level you are editing and launches it in a separate window. When the level is
+running, the Console automatically connects to the game's runtime and
+switches to communicate with it.
+
+To stop the playtest, close the game window or press the Stop Level button on
+the Titlebar. If the runtime takes too long to stop, it will be forcibly
+terminated. At exit the Console will switch back to communicating with the
+editor's runtime.
+
+To run the full game, choose ``Debug -> Run Game`` from the Menubar. In this
+mode Crown launches the game as it would run for an end user.