Garmin etrex 10 distance measurements

[Coogan]

Hello, I'm new to this forum and joined because I recently purchased a garmin etrex 10. I will be using the device to mark locations in Costa Rica as I am carrying out research on poison dart frogs in the rainforest. The main issue I have with the device is that I can't work out how to record my distance travelled (not in a straight line). I want to know when I have walked exactly 1km from my start point, the route will not be a straight line and so may loop back near to where I started or snake away from the start location. I will not know the end point of my 1km walk until I reach there as my routes are supposed to be random, hence the need to know when I reach 1km to standardise my walk.

Can anyone give me some advice or help, it seems like such a simple thing to measure but I can't for the life of me find out how to do it, the instructions with the device are naff!
Thanks in advance,
Coogan :D

[sussamb]

Just set a data field to show the Trip Odometer. You can reset this whenever you want to and it will show distance travelled since last reset.

Are you looking at the full manual? It's quite detailed with all the data field options listed in the Annex.
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