First, click the Start button and choose Run. The System Editor will run and you'll see a window with system configuration files. You might see lower-case letters or a mixture. It will have brackets around it. Below it are lines of code that tell Windows the size and shape of the fonts used for DOS windows.
All lines start with zero and then have numbers following a space.
Those numbers are in a sequence, and you'll notice right away that some numbers have been skipped. You can customize this list by filling in the settings that have been skipped. Don't make any changes, however, until you've finished reading my instructions. Here's an example. You can figure out a likely pattern for missing entries by looking at the ones that are listed for others.