Layers name

I need to write my layer's names with lower case  or with a mix of lower case and upper case.

Ex: Plane

PartBody

I need this, because when I import the file to my machining software, the related geometries in layers, will be recognized to specific functions. But my machining software needs those combination with upper case and lower case layers names.

But every time i write this in creo, he always write those names in upper case.

any configuration, or any tip?