For Mac

1. See the apple icon in the very upper left corner of your screen? Click on it -> 2. Then go to "Control Panels" -> 3. go to "Monitors & sound" -> 4. Then you will see a dialogue pops up. 5. On the right hand side of the dialogue you can see "Resolution" option. 6. Change it to higher or equal to 800X600.

For PC

1. Go to "Start" bar -> 2. "Settings" -> 3. "Control Panel", 4. double click on "Display", 5. then click on " Settings" tab, 6. on the lower right hand side you can see "Screen area", from here you can adjust resolution of this computer.7. Move the adjusting bar to higher or equal to 800X600.