Hiding the glyph on a TAdvToolBarButton

I want an option to set my toolbar buttons so that only the caption is displayed, but for that I need to be able to hide their glyphs without destroying them.

Will I have to use some convoluted workaround or is there something built-in I might have skipped over?

Sorry, there is at this time not a built-in feature to hide glyphs without destroying the glyph.