In MEX 16, it is now possible to toggle to App Mode when on a Desktop. To do this, expand the More drop down in the Side Menu and select App Mode.
When App Mode is selected, you will brought to the Home page of the App. This will display an assortment of Work Order categories, along with access to the Prestart's function of MEX.
To navigate back to the Desktop Version of MEX, select the three lines in the top right and select Desktop Mode