Entry doors with glass panels open up a room visually and bring in natural light, but they can reduce privacy and cause a room to heat up in the summer. A covered door blind is a low-maintenance way to fend off the sun (and nosy neighbors) while making natural light readily available. In most cases, these blinds can be installed using only a screwdriver. The directions below are general; be sure to follow the instructions enclosed with the window treatment that you buy.