Modelling
Timeline and parameters
The timeline at the bottom lists every feature in the order you made it. Drag the marker back to see the model as it was, then edit an earlier step. Everything after it rebuilds.
Name a value once and use it anywhere a number goes. Change it, and every sketch and feature that uses it updates.
Press Ctrl B to recompute the whole model.
Something not working as described? See Known issues in the editor.