Gleb Kilichenko

Come on, Evernote team, just add a 'use as a thumbnail' item to the context menu which you already have on a file click. Add like a couple of lines overriding a selection algorithm. If for some reason you dynamically assign the thumbnail to the note when it is displayed then add one stupid "If" crutch which would check whether a specific pic was selected, even in this case you'll have one more field for the file id or whatever, wouldn't overload your note class too much, so please, implement finally what looks like a 30 minute junior dev task. With hope, yours faithful for like 7 years user.