A segment can be rotated so that only that segment (and attached static segments) will rotate. Any attached dynamic segments will keep their angles and lengths. This can be useful in certain situations and prevents the need to restore the angles of attached segments with a second drag. Attached static segments will move with the rotated segment so that they form a single rigid object that always moves together.
This can be done by holding the Caps Lock key while dragging the handle, or by enabling the option in the canvas toolbar.
Drag a red handle while holding the Caps Lock key to rotate only that part.
Attached parts will move with it but their angle will not change
Isolated part rotation can be combined with segment bending and/or segment stretching, either by using Caps Lock + right mouse button + Ctrl or by enabling the canvas toolbar options.