Adding ¨Previou Lesson¨ and ¨Next Lesson¨ inside unit

Hello there,

while using Coursepress I noticed that I don't have a NEXT or PREVIOUS button to skip between lessons, instead I have to go back to the list of units and select another lesson (this is more unwanted page loading), is there any way I can put a code so the users would have this option?

it would be great to have this feature, if the users wanted to see all lessons they would click on ¨Units¨ as shown in the image attached

another question – is there any difference between clicking in ¨DONE¨ or ¨Save progress and Exit?¨ an the end of a lesson?

sorry for being asking too much but I think that will bring benefits for all !