on 5800 I have to touch on empty black space to open the "options"-menu (delete,image info,exit).
If a picture in the upper or lower row is active there is enough space above or below.
If I have a picture in the middle row as active picture, I do not find any empty black space for opening the menu.
This is when I use horizontal screen.
For vertical screen of course upper and lower rows change to left and right rows.
The problem with middle row is identical..