Sumatra PDF is a PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows

Disable annotation window and shortcut to save it?

Any way to skip the annotation windows? You also need to click save changes to pdf whenever you want to add something. Is there faster way to add highlight only using shortcut?

A= Annotate with default highlight (Area or selected text) , much as it used to, just ignore the options box to change color / delete / save (park it, reduced to one side) It is handy to edit highlights comments text on occasion. At end of sesion you should be asked / reminded to save all once, (better if you want to remove or change some, as the file increase is then minimal for just the one save)