Ad1. (1.jpg)you can do it by superimposing dimension lines on yourself and (unfortunately) manual and adding 2x in front of the text.

You can insert additional text with position - >> description (unfortunately only 2 characters, the appropriate positions to be behind the "circle" must be set in the options)

Ad2. (2.jpg)You have to remember about this when unfolding the bars (creating the distribution of bars). You must set the concrete cover to 0. (3.jpg)You can change it later by setting a new distribution area and zeroing the concrete covers, and creating a new distribution with two clicks. (Remember that both concrete covers need to be set to 0, so set them to 0 before each click)
I also recommend this setting see green circle).