case-fold-search for various operations.
(@pxref{Replace}) and the minibuffer history matching commands
(@pxref{Minibuffer History}).
+ 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
+@code{find-tag}. To find these variables, do @kbd{M-x
+apropos-variable @key{RET} case-fold-search @key{RET}}.
+
@node Replace
@section Replacement Commands
@cindex replacement