If you want a line and all the lines nested underneath it to be viewed as a comment, press the Shift key while you create the line. Note that instead of a wedge, the line has a chevron to its left. Any text that's indented under one of these lines is also viewed as a comment. You can go on and on, but thankfully, readers can collapse the whole comment down to a single line. So if you're verbose, the code doesn't become less readable.
Comments play an important role in programming.
They are bits of text that are meant for the programmer but are ignored when the code is compiled. Comments are also used in other ways in Radio, for example the Directories feature in Manila understands comments and displays them specially. You can also add comments at the end of a non-comment line by putting a pair of slashes before the comment. This only works for scripts, other kinds of outlines generally do not respect this convention. The Outliner menu More information about the outliner is on the Outliner Menu page.