Viewer Bug lost items on screen view

hi i can seem to see my components - how do i get them back to show on screen?

help please

I drag drop them to the right of the viewer and they disappeared.

Change the visibility of the components you can see

no change

Temporarily increase the phone size to tablet in the Designer?

Switch back from weird color scheme?

Collapse [-] and make invisible the sub-Arrangements of the parent Horizontal Arrangement, to expose the exiled component