Another way to do this similiar to creating a border around your shape, is to create either a male or female tool path depending on which side you want to place the offset. On the Basic tab when you select your tool path, click on the Tool Library button next to the Tool selection box, select the Plasma tool then change the D1 Kerf value to double the size you want your offset, if you want a 1/2" border then change the D1 value to 1, also uncheck the box to create Lead-in and Lead-out. Apply the tool path then click on the tool path that it creates and go to Arrange > Break Path so it is no longer a tool path and you will have your offset. Be sure to go back in an change your kerf for your plasma tool to what it was before, you can do this under Machine > Tool Library.