Display and operating device, in particular a touch panel

An apparatus comprising:

• a touch-sensitive display unit displaying display objects and detecting inputs from a user;
• and
• a processor comprising:
• a first module that processes display data of a first display object that provides information regarding a technical process and display data of a second display object that simulates an on-screen keyboard having keyboard elements (T),
• a second module that superimposes the first and the second display objects on the display unit such that the on-screen keyboard and the first display object appear overlapping and mutually transparent on the touch-sensitive display unit, and
• a third module that processes detected inputs from the touch-sensitive display and outputs updated display data to the first module to update the first display object while superimposed with the second display object.

A method, comprising:

• displaying display data providing information regarding a technical process on a touch-screen as a first display object;
• superimposing a second display object on the touch-screen such that the second display object is transparent on the touch-screen with respect to the first display object, whereby the first display object and the second display object are simultaneously visible to a user on the touch-screen;
• and
• updating the first display object while the second display object is superimposed on the first display object and while both the first display object and the second display object are visible to the user.