Here you can find step by step instructions om how to record a track with GPX Viewer PRO:

1. Open main left menu.
2. Tap Track Recording button.
3. When red recording icon appears on the right side of the screen tap it.
4. Select a profile that fits your transportation means.
5. After starting the recording you have 3 different symbols to use.
   1. Stop the recording.
   2. Pause the recording.
   3. Add waypoint from your current location.
6. After stopping recording, you can adjust track details such as name. description, links, location and file type.

Below is video showing following instructions above: