Is there a way in Intellicad - Carlson to select a line that is overlapped or underneath another line.
Select the line that is on top then
View>Display Order>Send to Back
The line that was underneath should then be on top.
Quicker yet, select line on top, type dr, then b.
In OLD ICad I would just drag a crossing window across all of the lines thus selecting them all. Then I would click on the top line which unselected it. Carlson ICad doesn't work that way anymore (it is just probably a setting I have not found yet)
You can still select them all like I used to, then you can hold shift and click on the top line which will unselect it. I'm still getting used to that procedure. That saves you from messing with the draworder stuff, and you can also use that functionality to select a bunch of stuff with a crossing window, and then unselecting a couple things you do not want.
I don't know if ICAD works the same, but I just learned a few weeks ago that AutoCAD has an option called Selection Cycling (Ctrl+W) that when you select something that has other stuff below a menu comes up listing all of it and you can then select the entity that you need from the list, it will highlight the entity when you hover on the list.
Try holding ctrl and shift and clicking on the line repeatedly to cycle through the selections.