@SMARTER I needed the firmware update! Now i have the missing option available. Thanks for pointing me to that.

@SMARTER Not available here. Perhaps depends on camera modell?

@SMARTER thanks for fast replay. in the iPhone-App there i also access the settings using the cogwheel . But I only can choose timestamp and enter additional text. No logo on/off option avaliale.

@SMARTER I could not find this settings in my app (iPhone) for the Model C110. Which App are you using?