I've been working on a Garmin 595LM, where I'm able to edit the KTMF file to make tracks thicker/more visible, and I'm now looking to try and do the same on my Montana 650t, which doesn't use KTMF files at all.

On the 595 I was able to increase tracks from the barely visible scale of 1, up to scale 3, which while not as good as I wood like, is at least visible, with 3 being the biggest it can do.

So the question is whether anyone knows if there is some way to make track lines thicker via some form of editing?