Correct way to import icons?

[Tiemo Hollmann TB]

Hi there, again a beginners question, sometimes I think I have to stick with
every new feature I'll try. What is the correct way to import icons for
using as button icons?

I experienced the way to import them as an image control and assign them to
the buttons. But this way I have the icon images present on the card. I
think there must be a way to import them as a "resource", to use them for
buttons, but not having them on the card. I have seen the menu to create a
new image library and import my icons into that new library, but when trying
to assign the icons out of this new library I don't have this new library as
a choice to select and don't see it. I also tried "start using stack "my
icons", but rev doesn't knows this stack.

What am I missing?

Thank you

Tiemo