Don't give up yet. There are two work arounds you might consider. 1. For dimension text that's blocked by other elements: RMC the text/select properties/text/turn on fill with background color/OK. If it's still covered, RMC/select move to front. 2. For dimension lines crossing extension lines: Insert a text box with a space character at that spot and set the textbox to fill with background color. Next move the dimension line to the front as above. The drawback to this is it's not dynamic and can become unattached.