The owners manual for the Humax HDR-3000T 2tune is a little vague about to how to access the settings menu. In the General Settings section of the manual it says "Press the HOME button. Select SETTINGS." but it doesn't say how to select settings.
What it should say is "Press the HOME button. Press UP. Select SETTINGS."
Press HOME to open the main menu (with the Settings 'gear' in the top right corner).
Now press the UP arrow to change the 'gear' into a blue SETTINGS button, and press OK.