Much like most of today’s design software (e.g. Inkscape, Pinta, various apps in the Calligra Suite), Citrus has a toolbox, a bar on the left used for inserting stuff quickly. It combines commands from the old LibO Drawing and Insertion toolbars and contains both static and contextual (like “Insert symbol”, which only appears in a text field) commands. It does not house commands like “edit nodes” or “rotate” — that’s left up to the command bar/fizz of each object.
The toolbox takes advantage of Fitts’s law, so the clickable area extends to the left edge of the screen. Also, the toolbox can be quickly shown and hidden with a button placed at the bottom left corner of the window.