Staff need to change the length of this darker line indicated in the image, how can I do this?
That looks like the extension line of a dimension. If so, click on the dimension to highlight it, then click and drag the blue box at the end of the line.
Actually is THICK ENDS of a cut line, I decrease the length of it.
I'm sorry, I misunderstood. If that's the line of a Section Cut, then RMB on it and choose "Edit sketch" from the drop-down. Edit the line as you want, then click on the Rebuild button.
I just need to edit the thicker region, necessary to reduce the length of it.
Can you post a screenshot that covers a larger area? Apparently I'm not understanding what you're trying to do.
that is controled by the linestyle document property. but I know of no way to chsnge the length, only turn on/off the bold ends.
Go to Tools> Options > Document Properties > Line Style and change the value for Thin/Thick chain line style next to B to the length you need
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