Index Options Menu 

Help Settings ...

This dialog contains a choice for selecting the internal viewer or a HTML browser to view help topics. The path to the documentation you are looking at and the JDK documentation can be specified. A "?" character in the index file name will be replaced by the first character of the keyword you're looking for, a"#" character will be replaced by a number (e.g. "1" for "a", "2" for "b" and so on). HTML browser's options are similar as described in Run Settings ....