Hi Kinski,
good comment. It is true that it was fullscreen once.
When viewfinder was fullscreen it had also bitmaps instead standard softkey text, but it was dropped away due bitmap drawing positions required too much phone specific orientation handling.
Instead fullscreen, standard display is shown with softkey texts, which narrow picture unfortunately. But system handles the sofkey text orientation
right for each phone model, which is most important.
I hope you understand why we need to stick this current implementation

Cheers,
Jukka