But what is the difference between “SOLID” in DrawType
of the 3D-View “header bar” and SOLID of the DrawType
activated via F7->DrawPanel (where the Draw Extras are
located too?) It only works for me when SOLID is set
via the last option.
is per object and in the 3D window it’s the whole scene.
Think of the F7 buttons as limits; if you set a cube to “Solid” then it won’t be able to go into Shaded or Textured mode in the 3D window, but it will be able to go into wire.