I have a Kobo Aura HD (the original 6.8" larger-screen Kobo reader, pre-H2O) and am running the latest public (non-beta) firmware on it. Searching for "devmodeon" does indeed provide an "invert screen" button, however, after several page turns within a book, the screen reverts to normal video. Either of the following will make it go back to inverse video:
* Looking up a word by a long press
* Bringing up a menu
Neither a simple page turn nor using an edge swipe to adjust brightness will restore inverse-video mode.
Last edited by RobertJSawyer; 02-01-2020 at 12:39 PM.
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