If you have ever wondered why there is a circle when you click to select objects in Ipe, well, hmm, that means you may want to read Section 4.2 of the manual, which explains the selection model in Ipe.
Basically, when the mouse button goes down, Ipe computes a list of objects that hits the circle, sorts the objects by proximity, and selects the first object by default. To cycle between the objects in this list, press the Space bar without releasing the mouse button. Note that the size of the circle is controlled by “select distance” in the Preference dialog.
It’s a great time-saver if you use Ipe for complicated figures.
Together with the ability to quickly zoom in Ipe using the wheel, selecting objects in Ipe should be a breeze.