[Q]Text/Dialogue only rollback/log

[Nandaka]

Hello,

I want to ask how to display only the dialogue(without changing the image/background) and how to disable selecting menu item (only show the selected by the player) when rolling back. I dont want the player to be able changing their selection after picking the menu items (like in the commercial game).

I've read about readback, but it is broken(when I run the game, renpy give me an error), and if i'm not wrong, when rolling back, renpy reset every variables to the last value before rollback, so i cant use some flag in the menu, isn't it?

thanks