If you have an existing drawing or photograph that you want to copy the perspective from, doing so is really easy.

1. File: Import
   Use the file menu to import any standard image format to drop it onto the workspace. The image will resize to fill the workspace based on the size and aspect ratio you’ve set.
2. Select the “Tracing Tool” in the Toolbar.
   By selecting the tracing tool in the toolbar you will automatically be asked to pick an image to put in the workspace.