Round edges
Soften a sharp edge into a curve (a fillet), or bevel it flat.
Pick the edges
Tap an edge to select it. Tap more to round several at once; the bar counts them.
capture: three edges selected, the bar counting 3Set the size
Drag the handle, tap its value to type one, or use − and +. A 2 mm round is a good start for something you will hold.

Round or flat
Switch Round to Flat for a straight bevel (a chamfer). Dragging the handle back past its start does the same.
capture: the Round / Flat switch with a chamfered edge
Stuck in the app?
In a project, tap Show me on the coach card to watch the step played out. Support has an email address if that doesn't do it.