Silhouette Alta 3D printer modify options Posted on 26th March 2019 1- Open the Silhouette Alta software. Go to your library/folder to upload your design. 2- Insert your design. 3- Insert a second design. 4- There are 3 different options with the modify functions. To modify any design you will need to place one design over the other. 5- Once your designs are places where they need to be. click on the select all icon. 6- Next you can now select the subtract last from first option. 7- This will remove the shape of the last item you placed from the first item you placed. 8- The next choice with the modify tools is the subtract first from last. Make sure both designs are selected and then click on the modify icon. 9- As you can see the first design was removed from the last design. 10- Lastly there is the intersect icon. Make sure both design are selected. Click the intersect tool. 11- The intersect tool will remove all parts of both designs apart from the sections that touch (intersect).