[Plugin: WP-SynHighlight] "Show Code Only" shows line numbers

Hi, this is a great plugin. I only cannot figure out how to have line numbers in the normal code but not in the window that opens with a click on the “Show code only” icon.
I tried all available settings on the backend but I didn’t succeed.
Any hint? Thanks!

PS: A nice new feature would be a button “copy code to clipboard”.

https://www.ads-software.com/extend/plugins/wp-synhighlight/