6.4 Minibuffer History
Every argument that you enter with the minibuffer is saved on a
"minibuffer history list" so that you can use it again later in another
argument. Special commands load the text of an earlier argument in the
minibuffer. They discard the old minibuffer contents, so you can think
of them as moving through the history of previous arguments.
Move to the next earlier argument string saved in the minibuffer
Move to the next later argument string saved in the minibuffer
`M-r REGEXP <RET>'
Move to an earlier saved argument in the minibuffer history that
has a match for REGEXP (`previous-matching-history-element').
`M-s REGEXP <RET>'
Move to a later saved argument in the minibuffer history that has a
match for REGEXP (`next-matching-history-element').
The simplest way to reuse the saved arguments in the history list is
to move through the history list one element at a time. While in the
minibuffer, use `M-p' or up-arrow (`previous-history-element') to "move
to" the next earlier minibuffer input, and use `M-n' or down-arrow
(`next-history-element') to "move to" the next later input.
The previous input that you fetch from the history entirely replaces
the contents of the minibuffer. To use it as the argument, exit the
minibuffer as usual with <RET>. You can also edit the text before you
reuse it; this does not change the history element that you "moved" to,
but your new argument does go at the end of the history list in its own
For many minibuffer arguments there is a "default" value. In some
cases, the minibuffer history commands know the default value. Then you
can insert the default value into the minibuffer as text by using `M-n'
to move "into the future" in the history.
There are also commands to search forward or backward through the
history; they search for history elements that match a regular
expression that you specify with the minibuffer. `M-r'
(`previous-matching-history-element') searches older elements in the
history, while `M-s' (`next-matching-history-element') searches newer
elements. By special dispensation, these commands can use the
minibuffer to read their arguments even though you are already in the
minibuffer when you issue them. As with incremental searching, an
uppercase letter in the regular expression makes the search
case-sensitive (Note: Search Case).
All uses of the minibuffer record your input on a history list, but
there are separate history lists for different kinds of arguments. For
example, there is a list for file names, used by all the commands that
read file names.
There are several other very specific history lists, including one
for command names read by `M-x', one for buffer names, one for arguments
of commands like `query-replace', and one for compilation commands read
by `compile'. Finally, there is one "miscellaneous" history list that
most minibuffer arguments use.
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