Since I? tend to add small features that I later forget about and that nobody ever notices (for example, how many people were aware that the SWGB Mod Editor let them right-click-and-drag on the little colour-selection boxes to choose the colour underneath the mouse?), a rough unsorted list of miscellaneous obvious and non-obvious capabilities would probably be better than nothing. Thus:

• Drag rows (using the left mouse button) to rearrange them.
• Use Ctrl+Z/Ctrl+Y, or the Edit menu, to undo/redo changes. There is no limit to the size of the undo history, though some actions (e.g. exporting to a file) can't be undone (yet).
• Double-click or right-click cells to edit them. The editing method depends on what column they're in.
  • In the text editing boxes: Use the escape key to cancel. Use the enter key, or click outside the box, to accept the changes.
  • In the table-style boxes (props, animations): Mostly identical to the main actor editor window, but without the menu. Use Ctrl+Z/Ctrl+Y to undo/redo.
• Double-click the dividing line between column headers for the standard 'resize to fit contents' behaviour. Drag the dividing line to resize.