And the answer might depend on what version of MEP you have.
Did you try looking in the manual? For example, on page 49 of the MEP 17 PDF Manual I read:
Adjusting the workspace
The program monitor, the Arranger, and the Media Pool can be shut off completely or freely repositioned. Personal settings are automatically saved when MAGIX Movie Edit Pro 17 Plus is closed and remain unchanged when the program is reopened.
Program settings -> Display presets provide a collection of useful configurations for display on the monitor. On systems with only a single connected monitor, only the first two are practical. The presets are explained on the right side of the dialog. All window properties of the Arranger, video monitor, etc. can be changed after the application of a preset.