For IS scripts that have a large number of functions and procedures in the [Code] section, I find it's sometimes helpful to generate a list for review and quick double-click navigation:
1. Enable regular expressions (Alt+R or Edit|Use Regular Expressions)
2. Execute Find in Files (Edit|Find in Files or Ctrl+Shift+F)
3. For the search string, write: ^(function|procedure)
The Find Results pane at the bottom will contain a list of functions and procedures. You have to repeat the search if the code lines change, but I find it's handy for quick navigation where there are a large number of functions and procedures.