carloscosta thanks but i dont hide everythink just one item... how to do that?
What button? There is another option
prevent_right_click which blocks right-clicking to download images, and also automatically disables the download button.
If you want to hide all single-file download buttons by CSS
_files/css/custom.css, you could do something like this:
Then you can hide other buttons based on action, but I need to know exactly what you want to hide.