Either (v) for visual and the arrow keys, or (V) to select entire current line, then (y) to yank. (yy) will also yank lines without entering visual mode, which I use a lot.
If you're asking how I copy in general from stdout with the cursor, I select the text (selection appears yellow) and press Enter and it copies to the clipboard :)
If you're asking how I copy in general from stdout with the cursor, I select the text (selection appears yellow) and press Enter and it copies to the clipboard :)