Rollei DF-S 310 SE Manual De Instrucciones página 25

In main Menu mode press OK/ENTER enter capture mode, then press
Convert/Mode then press OK/Enter the picture would be captured.
Before pressing to capture picture, you can press left button to mirror and
press right button to flip the current picture. And you can press OK button to
set Exposure.
8
OK/Enter
OK/Enter
Convert/Mode