IBM CF Series manual

The prompt, “Pixels/Inch:”, will appear. Enter the number of pixels resolved per inch in decimal followed by a <CR>.

At this point, the prompt “Display String:” will appear. Enter a four-character reference that is significant to your operators, such as “LASR” for laser printer output or “FULL” for full resolution or “500” for the actual resolution. Pad with spaces if the reference contains less than four displayable characters. ( No <CR> is required, after the fourth character is entered the cursor will automatically move to the next prompt.)

Next, the prompt “Divisor:” will appear. Enter four divisor digits. The decimal point appears automatically after the first digit and does not need to be entered. (No <CR> is required.)