When you tear off a ruler and move it, Canvas X takes a snapshot of the ruler and pastes it into the document as a paint object. To tear off the ruler on a PC, hold down the Alt key and drag the ruler onto the document area. On a Mac, hold down the Option key and drag. By default, Tear-off rulers are not printable. Open the "Document Layout" Palette, select the ruler object in the list and click the dot under the printer column to enable printing.