I think this is a non-functioning 'feature', which is not available in Designer.
Unless somebody can suggest otherwise, you could pre-name layers in any order that might suit, and save this as a template file, for future use.
Designer is a good basic 2-D program, which is reflected in the price.
So, not many bells and whistles!
I apologise, if this is of not much use.
You can design without engineering, but you cannot engineer without design.
Using Win 10 with Designer 2017-2020 and TurboCAD Pro. Plat. 2018-2020 + Lightworks (64-bit versions) + AnimationLab 5.2.
Windows 10 Pro (1909) 64-bit