When you open a file in the IDL Editor, all functions and procedures defined in that file are listed in the Functions/Procedures Menu. On Windows, this feature appears as a pull-down menu located on the IDLDE toolbar. On Motif, this menu is accessed through the () button in the upper left corner of the Editor window.
Select a procedure or function from the drop-down list to move the cursor to the beginning of that procedure or function. This is especially useful for navigating large program files containing multiple procedures and functions.