I have created a gallery that has a number of icons in it and when a user selects an icon, it will insert it onto the slide. My question is this: Is it possible to organise a gallery so that I can break up the icons into logical groups?

So far, I've only found out how to specify the width of the gallery using the "columns" property, however the sets are of varying length and the ribbon will always fill up the entire row before moving onto the next.

Ideally, I'm aiming for something similar to how the embedded drawing gallery works, as that breaks the shapes up into Lines, Rectangles etc. I realise that you can't embed directly into the ribbon which is fine.

A second, less perfect solution would be to set a column width equal to the widest group and then pad smaller groups with blank icons that cannot be selected or highlighted.

Thanks.