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Joe Horn · (This post was last modified: 02-09-2022 03:17 AM by Joe Horn.)

See pages 12-14 through 12-17 in the Owner's Manual, the section called "Using Equations to Display Messages". In brief, the idea is to press shift EQN to start entering an "equation" into the program, with the understanding that your "equation" will not be mathematically valid at all, but that's ok, because you will be using it simply as a message, and not evaluating it. To type letters, just press RCL then the desired letter. If flag 10 is set, equations are displayed instead of being evaluated. More info in the manual. Voila... messages!