Overlapping lines appearing thicker

[Tim Ryan]

I agree with Jens on this - in fact, the behaviour of lines in general is
the biggest area I have issues with Omnigraffle. We run a web design
company, so appearance is critical, even if we are presenting a site
structure diagram to clients.

I don't like:
1) Overlapping lines, even when they are connected to the same magnet
2) The automatic routing of lines - I would like some way of fixing the
route of a line within a diagram (eg to avoid clashing with other elements)
rather than simply specifying a start and end point)

Tim Ryan