GNU Info allows you to search for a sequence of characters throughout an entire info file, search through the indices of an info file, or find areas within an info file which discuss a particular topic.
The most basic searching command is `s' (
`s' command prompts you for a string in the echo area, and then
searches the remainder of the info file for an ocurrence of that string.
If the string is found, the node containing it is selected, and the
cursor is left positioned at the start of the found string. Subsequent
`s' commands show you the default search string within `[' and
`]'; pressing RET instead of typing a new string will use the
default search string.
Incremental searching is similar to basic searching, but the string is looked up while you are typing it, instead of waiting until the entire search string has been specified.