delete the upper-case character from the search string, it ceases to
have this effect. @xref{Search Case}.
+@cindex invisible text, searching for
+@kindex M-s i @r{(Incremental search)}
+@findex isearch-toggle-invisible
+ To toggle whether or not invisible text is searched, type
+@kbd{M-s i} (@code{isearch-toggle-invisible}). @xref{Outline Search}.
+
To search for a newline character, type @kbd{C-j}.
To search for non-@acronym{ASCII} characters, use one of the
well as to string search. The effect ceases if you delete the
upper-case letter from the search string.
- Typing @kbd{M-c} within an incremental search toggles the case
-sensitivity of that search. The effect does not extend beyond the
-current incremental search to the next one, but it does override the
-effect of adding or removing an upper-case letter in the current
-search.
-
@vindex case-fold-search
If you set the variable @code{case-fold-search} to @code{nil}, then
all letters must match exactly, including case. This is a per-buffer
performed by the replace commands (@pxref{Replace}) and the minibuffer
history matching commands (@pxref{Minibuffer History}).
+@c isearch-toggle-case-fold
+ Typing @kbd{M-c} within an incremental search toggles the case
+sensitivity of that search. The effect does not extend beyond the
+current incremental search to the next one, but it does override the
+effect of adding or removing an upper-case letter in the current
+search.
+
Several related variables control case-sensitivity of searching and
matching for specific commands or activities. For instance,
@code{tags-case-fold-search} controls case sensitivity for
used the minibuffer to read its arguments. @xref{Repetition, C-x ESC
ESC}.
+@cindex invisible text, and query-replace
+ The option @code{search-invisible} determines how @code{query-replace}
+treats invisible text. @xref{Outline Search}.
+
@xref{Operating on Files}, for the Dired @kbd{Q} command which
performs query replace on selected files. See also @ref{Transforming
File Names}, for Dired commands to rename, copy, or link files by