Flipping a 3d object over to carve other side

I have an stl file of a guitar neck that I imported into Easel pro. The neck is currently face up in Easel. I want to know if there is a way to flip the object in order to carve the other side of the guitar neck. (i.e. step 1 carve top, step 2 to carve that back of the neck.

Is this possible? I don’t see any options to do this.

Thanks in advance.
EM

Open it in a 3D cad program and rotate it 180 degrees and save it as a second file.

Don’t know about Pro…but this came up:

When you load the file, top left screen
MODEL

ORIENTATION

Top V

Just click on V and get top / bottom etc.