Guides and Snapping
Too much snapping annoys me -- you're just trying to reposition something and it's snapping to midpoints and all the other objects on all the other layers. So for Mojave Paint we do something a little different and only snap to guides.
But the guides themselves snap, so if you want to align things to the midpoint of the document, just put a guide there. Also, you can hold Option to snap them in thirds, making it easy to divide the canvas into thirds or sixths or twelfths.
With guides in place, the move tool and the marquee selection tools will snap to those guides, unless you hold Control to disable snapping, or uncheck View > Snap in the menu items, or hide the guides.
