Using the Score Settings (Text page)
In the Score Settings dialog on the Text page, you can find a number of text-related settings. The symbol buttons correspond to the symbols found in the Other section of the Symbols Inspector.
On the Layer pop-up menu, select the layer that you want to use.
The text symbols available for this layer are displayed to the left of the pop-up menu.
You can use the text symbols in the same way as you would use symbols from the Inspector or a symbol palette.
When you select a text symbol and move the mouse pointer over the score, the pointer changes to a pencil, and you can enter text at the position you click on.