conEmu: Is it possible to lock scrollbar and prevent it from auto scrolling down
You may only switch to alternative mode - Win+A or button on toolbar. That will be like a pause.
Locking scrollbar is useless, because when your output reaches the bottom of the scroll buffer, the contents will be scrolled upwards line by line, even if scrollbar is still at the end.
You can pause the output by pressing the Pause button on the keyboard, as explained here: https://conemu.github.io/en/AlternativeBuffer.html#pause
Also, you may press Pause key. It will pause most console applications (who just print text to ‘StdOut’). Press Pause key again to release.