1 Nickel

A little stylus insight, please.

I have a Venue 8 Pro with the new stylus. Can someone explain the various cursors I've observed on the screen while using the active stylus and how to switch between them. First there is a small circle with the crosshairs on the outside on the screen. Then there are some arrows. I may be missing others. What do these cursors signify, and how do I switch from one to another? Thanks.