Hello @safield, what desktop environment are you using?
If you right click on the window, there should be an option to copy all text to the clipboard. Also, Ctrl + A, Ctrl + C works here in a quick test.
I never tried right clicking on the window. Now the options are available to me. Maybe a always present button that says "copy all" would be more obvious to airheads like me.
Nothing extracted yet.
I am running steam on Linux Mint 19.3
There is no way to copy the system information. There is no caret or text highlighting available.