I don't know how I could change the paint tool displaying mode but now I couldn't find out to change it back and the brush where I see only where the stroke is pointed is so horrid ...
any solution on how to change it back would be really appreciated. I've already spent some hours trying to figure out where's that option.
In version 2019 it changed to:
Tools / Options / General
You will see under "Appearance" "Cursor Type", Select "Tool" and be Shure you have the checkmark in "Shape cursor for Brush tools"