Control-F works well if you are searching for something very specific, but is not so good when you are not quite sure what you are looking for. I made the request specifically because I am frustrated with control-F producing (a) too many irrelevant hits; and (b) forcing you to go through them in sequence. At least that's the case with Acrobat Reader. if you want to know what are the valid token formats for example, searching for "token" is a hopeless way to proceed. It produces over 300 hits throughout the document. The document already has a reasonable structure so that a TOC that would get me to the right part of the document would be helpful.