How do you track distance travelled in NM with the Garmin

Casual Series X player here that's addicted now after getting the entry level controller the other day (TM Hotas One), I'm enjoying the bush flights but found that the ETE's for each leg as suggested in the navlog are about 20% less time than it actually takes flying at max cruise speed. I can't seem to find a "trip counter" in the Garmin to simply measure my distance flown, is that not an option or is it hiding somewhere?

Please share your techniques for calculating distance flown and ETE's, currently I'm just going off feel with timing, landmarks usually work but the glare from the sunset on the Malaga to Valencia trip washes out the landmarks enough that I'd rather stare at my screens lol.

Thanks!