@philb88
nickdavies has already touched on this but just to check…
when you are using bikehike you can untick the ‘follow road’ box in the bottom right and then click anywhere on the map to make the track. So for offroad routes once that’s unticked you can manually follow any path you like.
You can also map out the track either on the Google map panel or the OS map panel to follow bridleways etc. On the Google map panel switching to satellite is good for following off road trails.
Finally you can toggle the map sizes as well to make either the Google Maps/ OS maps panel bigger or smaller.