| Value | Meaning |
|---|---|
| None0 | No scrolling. |
| Jump1 | Jump to new location. |
| StepBackward2 | Step backward. |
| StepForward3 | Step forward. |
| PageBackward4 | Page backward. |
| PageForward5 | Page forward. |
| StepUp6 | Step up. |
| StepDown7 | Step down. |
| PageUp8 | Page up. |
| PageDown9 | Page down. |
| StepLeft10 | Step to the left. |
| StepRight11 | Step to the right. |
| PageLeft12 | Page to the left. |
| PageRight13 | Page to the right. |
| Start14 | Scroll to start. |
| End15 | Scroll to end. |
Scrolling types.