NavFree app - anyone have a uaer manual?

Someone in this forum recommended that I try Navfree for offline maps. It's not bad but not as intuitive as I would have liked.

Anyone know of a user manual for this app as a Google search didn't bring up any thing?

My main question is in the top right hand corner. Is an arrow or triangle. When I press it, turn by turn directions stop and I don't know how to toggle them back on. Sometimes exiting the app seems to get it to go again.

What is the purpose of that triangle?

Thank you

If you're referring to the arrow with the circle around it that is the toggle for your voice navigation. If you're already in voice navigation touching it brings up the estimated time of arrival, distance traveled, etc. Touching anywhere on the screen should bring it back. Exiting the app isn't necessary if my understanding of your question is correct.