How to modify the length of dimension lines ?? The dimension extension lines are too long behind the dimension marks, even
with the offset set to 0.
This is done in Shape Style. Double click on the dimension and then select the Extension line. In Shape Style change the End Arrow size. Repeat for the other extension line. If you need to change a bunch of dimensions, do one first. Then get the Sample tool (pipette) and click on the edited dimension. Then click on the rest. To make subsequent dimensions show the same way get the Dimension tool, click on the pipette, and then click on the the edited dimension.
I would suggest you make these kinds of adjustments for your own template so you don’t have to change it every time you start a new LayOut project.