These videos explain: how to download gpx files from the Railwalks website (Android, or iOS), how to plan and record a gpx file to share with others (Android), and how to edit a gpx file (Windows). To view the video on a full screen (on a phone) double click on it. On a computer, you should see a full-screen icon in the bottom right-hand corner.
1) How to download a gpx file from Railwalks and use it to follow walks on a mapping app (Outdooractive). This is the Android version. For the iOS version of this this video please follow this link.
2) How to plan a route, and record it as a gpx file as you walk it (Android).
3) How to edit a gpx file, using Gpx Studio, a free online programme, on a Windows PC