As other have said, a combination of Firefox PDF tool, PDF Arranger and Xournal++ is all I’ve ever needed. And Okular is nowadays my viewer of choice, which does a lot on its own, too.

I will try that, thanks.

Thanks for that. Didn’t know about nested desktop. Pretty easy to install and use, too. Just not sure how to close it properly.

Half supervillain is American enough.

KDE.