GNU Emacs Calc 2.02 Manual
7.7: Display Modes
The commands in this section are two-key sequences beginning with the d prefix. The d l (calc-line-numbering) and d b (calc-line-breaking) commands are described elsewhere; see Stack Basics and see Normal Language Modes, respectively. Display formats for vectors and matrices are also covered elsewhere; see Vector and Matrix Formats.
One thing all display modes have in common is their treatment of the H prefix. This prefix causes any mode command that would normally refresh the stack to leave the stack display alone. The word ``Dirty'' will appear in the mode line when Calc thinks the stack display may not reflect the latest mode settings.
The d RET (calc-refresh-top) command reformats the top stack entry according to all the current modes. Positive prefix arguments reformat the top n entries; negative prefix arguments reformat the specified entry, and a prefix of zero is equivalent to d SPC (calc-refresh), which reformats the entire stack. For example, H d s M-2 d RET changes to scientific notation but reformats only the top two stack entries in the new mode.
The I prefix has another effect on the display modes. The mode is set only temporarily; the top stack entry is reformatted according to that mode, then the original mode setting is restored. In other words, I d s is equivalent to H d s d RET H d (old mode).
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