Segment panel
With a line or a dimension selected: objects you reshape from their ends instead of from a bounding box

A line selected and the Segment panel: position of the first end, length and rotation

When it appears

With a line or a dimension selected: objects you reshape from their ends instead of from a bounding box.

Fields

FieldWhat it does
PositionX and Y of the end selected on the three-point locator
Lengththe length: the selected end stays fixed and the other moves away or closer along the same line
Rotationthe angle, around the selected end
3-point reference point locatorstart, center, end: which one stays fixed. When you select an end here, its handle lights up on the canvas