Sure!
IF the font for the nine fields that make up the social security number is set at Courier New 9, I may want to change the 4th field on one detail line to MsSanSerif 10 BOLD. When the line is printed, I want to revert back to Courier New 9 because on the next line of the report, I'll want to changer the fon on the 2nd of the 9 fields only.

Each character of each detail line may need to be printed in a different font

I hope this makes the issue clearer!
Sandy