Hi
The play cursor can be difficult to see even if the color is changed. Please have a look at the play cursor in FL Studio. It leaves traces which is great. Here is a thread I found adressing the same issue: https://forum.cockos.com/showthread.php?t=171565
huh, you're right. The color can be edited in the theme menu (which got moved btw - Actions lists - Theme development: Show theme tweak/configuration window ). But the thickness can't.