
Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here. The PC will reboot with the new setting applied. Once the desired UMA frame buffer size value has been set, save the change before exiting the BIOS. Use the mouse or assigned keys to increase/decrease the size in predefined increments. Have something to add to the explanation? Sound off in the comments. In the BIOS, locate the UMA Frame Buffer Size setting usually found in the Advanced menu section.

I regularly use this from within the command prompt: I know that this is not the “why” with regard to your question, but if you want to change the screen buffer size from within a Command Prompt window (or batch file), you can make use of the mode command (mode columns, lines). Note: I recommend reverting the buffer size to something larger since 20 lines is not much in the way of displayed output.

SuperUser contributors Steven and miltonb have the answer for us.

Why is the default Windows Command Prompt output buffer size so large? Can its size be altered? The Answer I have been using the Command Prompt in Windows for a while now and just realized that there are several pages worth of empty lines below the text entry prompt. SuperUser reader Jay wants to know why the default Windows Command Prompt output buffer size is so large:
