The operation of KIllustrator is intuitive and easy to learn. It is very similar to other graphical programs. KIllustrator uses key bindings which are KDE standards.
Additionally pressing the CTRL key while moving the mouse constrains the movement to one in one direction or in equal amounts in both directions. For example, pressing the CTRL key while drawing a rectangle, draws a square.
Some functions can, of course, be used on more than one selected item at a time.