Scaling in ortho views

How do I scale an object along a plane in an ortho view?

Example:

I’m in the top view in ortho mode with a cube selected.
when I’m in translate mode, picking the ring of the manipulator will move the cube in the xy plane
Now, if I’m in scale mode, picking the ring will scale the cube uniformly along all axes. How can I constraint scaling to the xy plane?
In perspective I would have the Z-handle, which I would shift drag to scale along yx simultaneously.

Shortcut S to scale then to constrain to X&Y axis use Shift+Z, then drag mouse.
Or with the manipulator, drag one handle to scale then press Shift+Z to constrain to X&Y only

Perfect. Thank you!