hotspot action

Hello,

want to show an image when clicking on a button or something else (test for an interactive map). Have a button, an image placed on a shared layer which shall be visible (not the page) when clicking on the button and hidden clicking again. Can this only be done with coding I have no experience or there are "prepared" action available?

The example curiosity hotspot shows what's possible. But it is difficult for me to realize how they made those hotspot actions.

Are more tutorials available?

Thanks for reply.