Use the following steps to draw a display rectangle.
1. Move the mouse cursor to the location at which you want to place the upper left corner of the display rectangle. Press and hold the left mouse button. 2. Holding the left mouse button down, move the cursor to the position at which you want to place the lower right corner of the rectangle. Note that the rectangle appears on the screen as you move the mouse. When you have the cursor in the proper place, release the left mouse button. 3. The display dialog box will appear, prompting you for details concerning the appearance of the display. 4. When you are satisfied with the parameters for the display, press the 'OK' button.
If you later need to change the settings for the display, you may double-click using the left mouse button anywhere in the display to bring up the display dialog box.