Shape Editor Tool - Sharp Point Button
This button on the Shape Editor Tool Infobar changes all the selected point handles into sharp (cusp) corner points with independently controllable curve handles (not smooth points).
If no point handles are selected it sets sharp points as the default.
Clicking this button retains the existing line shape. CTRL-clicking reshapes the line to show a sharp join.
Z
Note
The keyboard shortcut only works when the Shape Editor Tool is the current tool.