That way I could slightly adjust the edges to be just how I want. The easier way is through the Screenshot app in macOS Mojave. a circle), I can easily tell where to place my corners by where the axes extend across the screen. This is because Macs automatically save your screenshots on the desktop. I tried to contact support to give feedback, but the feedback is lined to having a QQ Mail account, which I don’t have (and don’t want to sign up for).
The preferences screen is a little confusing, and there are some rough edges when using it But for my main use case - copying aerbitrary part sof my screen to my clipboard - it’s wonderful. This application comes closed to the Windows Snipping Tool from Microsoft Windows that I have found so far.