Copying and pasting from CBX is as simple as dragging your cursor over the text/field you want to copy, then moving to the destination and either using CTRL+V (your keyboard's shortcut to paste) or right-clicking and selecting Paste from the option menu. 

Additionally in Edge, if you highlight the text/field you would like to copy and hover, the Copy option will appear and allow you to copy. Follow the above instructions to paste to your destination.