What do the dotted lines on my Interactive Designer preview mean?

If you set a bleed for your template on the "Template Info" tab, you will notice on the preview pane when customizing the template that there are two dotted lines  - one will be red and the other will be grey or white.  The red line on the template represents the bleed.  The white or gray line is a "safe zone."  This line is meant to indicate to the user that any text or images beyond this line are going to be close to the cutting line.  The width of both lines will be the same.  For example, if you set a 9 point bleed in the template info tab, you will see the red dashed line at 9 points and the white or gray line at 18 points.  Neither of these lines will prevent the user from adding text or images outside of the bleed or safe zone.