I do not understand why it is not possible jet. After I Drag and Drop a Waveform inside VIEW. A possibility to change the x-Axis to absolute time should be possible.
The only way of doing it now is creating an extra Time Channel.
DIAdem 2011 made the creation of the corresponding DateTime channel from the waveform properties much easier by including a new "Absolute time reference" radio button in the Waveform<==>Numeric ANALYSIS function.
Making this even easier is a priority for the R&D team, but it's actually harder under the hood that you would guess by just looking at the user interface.
This request was implemented in DIAdem 2019.
Greetings
Walter