The global styles inspector is growing:

Those categories are all related to presets or design tools, except "Background image", which is a tool. So conceptually it doesn't fit at the top level.

A previous version of this issue put it inside a renamed "Layout" section, but per discussion it's not clear that this is actually where we want to be either, given there's a larger revisit we need to do as part of #47369.

To that end, it would be good to — for 6.6 — simply move the Background image tool inside inside Layout. It can even have a subheading, "Background". This would keep the existing, if slightly unclear, IA in place for 6.6, and not preclude a better structure in 6.7.

Previous version of this issue

As a pathway to a control for a single property, the newly added "Background image" section in global styles is an outlier.

To improve the iA for 6.6 we could combine it with Layout controls in a new "Site" section. This would also allow the panel title to be consistent across global styles and the block inspector.