From pages 37 to 42 of VA-76 Owner's Manual:
- press Tone icon of Main screen
- in the lower-left side of display you can find a Map icon; press it and a window will be opened where you can select one of the four tone maps
- press Back icon to go back to Tone window; the current map is shown in the upper-center part of the screen
- scroll the ones and/or their variations and you will discover how many they are
A complete list of the tones (sorted on maps) is available in pages 222 to 232 of VA-76 Owner's Manual.