The main index will usually help, especially if you know a word describing
what it does, without needing to know the exact name chosen for the function.
Tip
When using the index, keep in mind that clicking on an index term only takes
you to the section containing the index
entry. This section may be several pages long, so you may need to use the
find facility of your browser or PDF reader
to get to the index term itself.
Tip
A PDF reader usually allows a global find;
this can be really useful if the term you expect to be indexed is not the
one chosen by the authors. You might find searching the PDF version and viewing
the HTML version will locate an elusive item.