Instructions box in a navigable pdf file

Hello,

I am putting together a multi-page pdf that has navigable buttons on the top and bottom of every page.

On the cover, I would like to explain my readers about the functions of those buttons. Is there any way to have a nice colourful instructions box with round corners that would appear when they click on the instructions button but disappear as the reader clicked anywhere outside that box.

Thank you in advance.

Jo