I have the same unit. Here is a step by step.
If you want to start a new track do this:
1. Go to SETUP>RESET>CLEAR CURRENT TRACK
2. Back up one screen and hit TRACKS>TRACK LOG (make sure this setting is set to "RECORD, SHOW ON MAP")
3. If you so choose, you may change the other features in under "TRACKS" if you want different intervals, or track colors.
4. Go on your hike!
5. At the end of the hike go to TRACK MANAGER>CURRENT TRACK>SAVE CURRENT TRACK
6. You can view your previous tracks from the TRACK MANAGER menu.
7. You can upload your tracks into base camp by plugging your device into your computer and transferring the data.
If you are in the field and want to view previous tracks do this:
1. Go to TRACK MANAGER>"YOUR TRACKS NAME">SHOW ON MAP
2. Repeat step #1 for all the tracks you want to see.
3. VIEW MAP
Hope this helps.