Dimensioning User Interface Greyed Out

[Zdenko]

something i noticed when attempting to move a dimension line and not sure i understand why one is greyed out and unable to move the dimension line.

Operating system used: Mac Intel-based Sonoma 14.5

[runxel]

One time you clicked on the main dimension line, the other time you clicked on a dimension node.

You may ask "why" and fair enough, but this is done so nodes can e.g. have different witness line styles.