Launch the MsgView from this
link then click yr-age in the MsgID list at left.
Now the message pattern should show up in the upper-middle panel, and the center-middle panel shows the result formatted with default argument values.
Check out the table at bottom, message arguments are shown there, and you can fill in the Value column to test format the message. Notice the default values specified at the message definition was already filled, however you can change it to any value you like.
If you switch to the Information tab at the bottom panel, you'll
see where this message is define and where it is used in source code, and the
message usage declaimed at the doccomment definition in its Java source, with
the @usage tag.
tutor.msg, this will be explained
later.