Windows 10,Microsoft Edge,desktop computer with a mouse. I was reading a post on here,slid the curser up the side to go back to the top of the post. The top bar on the screen turned purple. I tried clicking on things and it left a blue dot. I moved the mouse and it drew a blue line. Kinda neat,but it wouldn't let me do anything else. It just kept leaving blue dots wherever I clicked.
I clicked an X in the right hand corner and it got rid of it,but how do I do it again if I want to use that feature? I can see where it could be a lot of fun if I could find it when I want to.