I went through similar questions raised here, one answer was to go to Options > LibreOffice > View > to check “Use OpenGL for all rendering”. However, after ticking the checkbox, even though I am able to use “mouse pointer as pen” in LibreOffice Impress the slide comes skewed. Without ticking the above-mentioned checkbox, I am unable to use the “mouse pointer as pen”.
I am sharing the LibreOffice version and my OS details that might help.
Version: 188.8.131.52 (x64)
Build ID: 3d775be2011f3886db32dfd395a6a6d1ca2630ff
CPU threads: 4; OS: Windows 10.0 Build 18363; UI render: default; VCL: win;
Locale: en-IN (en_IN); UI-Language: en-GB