You’ve created your design and would like to make a mirrored version of it.
Save the design.
Select all of the Objects (CTRL+A) and Right-Click on the selection.
Select Convert to CutArt.
It will be loaded into Trace.
We are not making any edits to the design; just saving it under a different file format.
Click File > Save As.
Make sure that the CutArt directory is selected.
Make sure that the CutArt filetype is selected.
Give it a filename and click Save.