Want to change the aspect of my pointer, marker

Want to change the aspect of my pointer, marker . The cross is too big and the center, small, I see in tutorials they have different markers when they draw, i would like to change it.
i cant send any screenshots yet because I cant even open my drawings, since the viewports started opening all Black , so, when I solve that issue (IF I solve that issue) , I’ll be able to try and solve this issue

Change Pointer preferences for accessibility on Mac - Apple Support.

i have the feeling she meant to change the crosshair size, which is hidden in advanced rhino preferences.