If you want to scroll the CMD window while a batch file is running, you can alter the Windows width (characters) and depth (screen buffer lines) by issuing a mode command in the batch file:

mode con\[:\] \[cols=c\] \[lines=n\]


                              con\[:\]   indicates the change is to be made to the current command prompt window.                              cols=c   specifies the width, c, in characters.                              lines=n  specifies the number of lines, n, in the screen buffer.