The Symbols Inspector

This area contains symbol section, which are used to add symbols to the score. It can be hidden/displayed using the Symbols option in the “Set up Window Layout” pane.

The symbol sections can also be opened as free-floating palettes by opening them, right-clicking any of the buttons and selecting “Open as Palette” from the context menu. This way you can move symbol palettes around on the screen by clicking and dragging their title bars. Right-clicking on a symbol palette brings up a pop-up menu:

Select “Toggle” to switch between a vertical or horizontal view of the palette.
Select one of the options on the pop-up menu to bring up the corresponding palette instead of the current palette.
Hold down Ctrl/Cmd and select a palette from the pop-up menu to open the selected palette in a new window (without closing the existing one).
Click the close button to close a symbol palette.

In the Symbols Inspector setup dialog you can specify exactly which symbol sections are shown.