I am trying to follow the directions, but I could use some clarification. Which is the Grace Note tool

Is there something that explains all the various tools? Nothing comes up when you pass the cursor over the Icon to tell you you have the correct tool. I know some are extremely obvious, but some are not to someone who's never written music before.
Do I use text for things like Fine and D.S.?
I am using Windows Vista Home Premium.
Thanks AnnR