The windows terminal (the user-interface around text-applications like cmd.exe) really sucks.
There is so much that the Unix-style terminals do that the windows terminal
To change the size of the cmd prompt, you can either change the window size from the properties box, which will only resize the window itself, or/and you can change the buffer size, which will resize the ... how to describe it, the number of remembered lines. To access the properties toolbox, right click on the title bar and properties.
Also, if you want to quickly copy stuff from the cmd prompt, enable the "quick edit" box in the properties window - it will enable you to select stuff, and "copy" it with a right click.