[anvers]

Unfortunately, no, because the changes aren't cached in such a way that you could go through every page, and save all the changes to every page at the end. With the upcoming redesign, there is no longer a separate editor screen and my plan is to only save when exiting the annotation editing mode or at regular intervals (which will be configurable in the annotation settings). The reason to save at regular intervals is if you never leave the annotation editing mode but you had done a significant amount of annotating and then the tablet ran out of power or the app was shutdown, you wouldn't want to lose all those changes. So I was thinking about choosing a default of saving every 60 seconds or something like that, which the user can then change if they want (or disable it if they don't care about the risk).

Having said all that, saving the changes is normally very fast as it's just updating a few tables in the database. What kind of device are you using? It sounds to me like there is an issue with the write speeds in the storage. 

Mike

Thanks for your quick reply !I am using:
Galaxybook 12, W10, i5, 8Go, 250 Go
The only thing I could try is to check if there is a difference if the score is on the main ssd or the added storage. 
To be completly clear, is there a difference for you in the speed by page turning in stylus mode and in the read mode ?