Change of base map when pressing 'Plot'FORUMS HOME SEARCH FORUMS

I'm using the mobile app. Having initially explored potential routes, I'm at the point when I went to start plotting. I have the type of map I like on the screen. It's centered in the right place and at the best scale so I press 'Plot'. My map disappeares to be replaced by a different type of map in a different place at a different scale. So, every time I go through the laborious process of getting back to where I want to be to start plotting.