Hello there, I do this by sort verification that PROPERTIES allow, select lines you want to verify (plines do not works, explode then, only lines works), go to geometry tab you must to see if isn't appearing *VARIES* in the axis you want to keep, it must be the same value along the axis (ex. vertical line: start X, end X) if so will display nothing or the the same single value valid for all the lines you select. I tried to change manually for a sort of lines misaligned in series but the behavior of line depending on the misalignment it may get crazy that you cannot expected, the other axis change together to a unknown length.
option 2 - If you talk about lines isn't connected, this will not works... (plines do not works, explode then, only lines works)
On JOIN allow, when lines are in a co-linear alignment, JOIN will not create nodes along the line, if do then were misalignment on it and this create nodes along the line joined. You can treat one by one, put the line in evidence by click once on it, now just click in the node you want to delete, while the node follow your mouse on screen press ctrl twice (don't hold) , then finally click wherever place on model screen. This delete one node, when you do it you can see how misaligned the line was in that segment, create a parallel xline before to take a comparative view instantly.
