I'm having a bit of trouble customizing the premade HUD nodes in Godot. I'm currently using Stretch Mode/2D, Aspect/Expand, and I'd like to have custom icons for things like the HSlider's Grabber that will still look clear and crisp when expanded.
The problem is I can't seem to set the scaled size of the icon. For example, I'd like to use an image that's much larger than the initial grabber size, something like 100x100 pixels, and scale it down, so that when the menu is expanded, it automatically increases the size without becoming blurry. With other images that aren't actually replacing the default nodes' icons its fine, because I can just change the size of the icon, but I can't seem to do that here. I just get a 100x100 image slapped onto the slider.
How can I reduce the size of custom icons that are applied to the built in HUD nodes?