Now I see, you can change the settings mentioned in the below posts, either in Calibre or on Windows Settings.
https://www.mobileread.com/forums/sh...88&postcount=2
https://www.mobileread.com/forums/sh...&postcount=159
I prefer to disable the Windows setting.
(as for attaching images, when replying you might see the "Go advanced" button, then there is a paper clip icon...)