Anyone know if you can get turn by turn navigation like on the f3 from a TCX or GPX file?
A better work around is to use MCBadgers TCX --> FIT Program for this at this link - https://www.dropbox.com/s/4fdzqmzgzum6tvr/CourseTCX2FITRC1.zip?dl=0 (Not sure this is most recent version, hopefully MC is around and can comment)
The link is good: my preferred options are Windows , Mac and 32-bit Linux, just because the bitly link lets me keep track of roughly how many people are using each version. The name is misleading, the release is 1.02; I decided to keep the link consistent, which requires the name to be the same, because the links are in forums all over the place and I don't want them dead.
That said, if Garmin have discreetly added TBT to the course creator on Connect, as Tim says, much of the need is gone.
On the map page (assuming you are in the process of zooming) you get the breadcrumb map (obviously) and a distance to the next turn at the top with an indicator marker of which direction the next turn is.
When you get near the turn, it pops up with a display of distance to turn and a marker which disappears when you are through the turn. Can't remember if you need to on the map page for this to happen or not.
Anyway, I found it quite handy on a loop running course as much to break down a longer run into sections than "real" navigation although was a handy fallback as was not totally familiar with my route.
How it decided what it thought was a turn was automatic and I could see anyway to "edit" the turns in GC and/or the app.
You can see these course points if you import the course into GTC. In theory you can edit them there and send it to the back to the 735. However as GTC is long since obsolete I don't think it is necessarily interpreting the course schema exactly as the 735 is and I fear sending back to the 735 from there with course points may not work exactly as intended. I had a few such problems when tried with a 920 a while back but TBH not tried on a 735 yet. What I could do "wirelessly" in GC and with the app was good enough for my purpose that time.