DJBREIT
Copy and paste it into you paint program.
When you have it in the paint program mirror the image
I don't have that program so you will need to do a little thinking.
Use gordon-creAtive suggestion Ctrl-D and see if it works.
It should go from this to this.
After you have that done copy and paste it back to the tile you got it from. And save it under a new name.
Most of the modification you will do will be in the paint program not in the MIX editor.
When you have it in the paint program mirror the image
I don't have that program so you will need to do a little thinking.
Use gordon-creAtive suggestion Ctrl-D and see if it works.
It should go from this to this.
After you have that done copy and paste it back to the tile you got it from. And save it under a new name.
Most of the modification you will do will be in the paint program not in the MIX editor.