The button controls the expansion and contraction of the blue part to clamp the spine of the book, and the surrounding feet are extended to find a comfortable angle to hang around the book by rotating to fix the page. There are still some problems with this design, such as the thin books can't hang up, etc. I will pay attention to it when I set the time later. Thank you for your attention
Give me more situations, it doesn't see how to use it at all.
How to use it?
The cover sprouted at the first sight.