There are editing commands to operate on them.
* Grinding:: Adjusting indentation to show the nesting.
* Matching:: Insertion of a close-delimiter flashes matching open.
-* Comments:: Inserting, illing and aligning comments.
+* Comments:: Inserting, filling and aligning comments.
* Balanced Editing:: Inserting two matching parentheses at once, etc.
* Lisp Completion:: Completion on symbol names in Lisp code.
* Documentation:: Getting documentation of functions you plan to call.