Allow us to set up the default and stepped Dimension Line Offset for the Dimension tool
When we Opt/Alt-click the object or just click a segment, Ai creates a dimension with some predefined distance between the object and the dimension line.
We can’t control it (plus we can’t choose which sides to use for Opt/Alt mode anymore, unlike in early Betas).
Also, we need to be able to hold a modifier while creating a dimension to constrain this offset to a set parameter, in a stepped manner, — something third-party plugins like BPT Pro and CADtools can do.

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whstlblwr commented
I came here to ask if it was possible to make the measurement text update when the line is resized, but I found this option + click feature and it seems like this solves my problem.
Deleting the old ones and automatically creating new ones this way is probably quicker than resizing.
I do agree that a default offset would be useful. Or at least have a checkbox in the settings panel or modifier key that places the dimension lines on the canvas, just outside of the artboard please.
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Ryan Yang commented
Hope to add new features for the Dimension tool.
Fixed extension line length.