# Keyboard Shortcuts

The following table describes the available keyboard shortcuts and their functionalities.

| Key(s) | Functionality                                                                                                      |
| ------ | ------------------------------------------------------------------------------------------------------------------ |
| H      | Go back in the baselayer history's stack                                                                           |
| L      | Go forward in the baselayer history's stack                                                                        |
| A      | Decrease both the `vmin` and `vmax` by an equal, internally calculated step (thereby maintaining their difference) |
| D      | Increase both the `vmin` and `vmax` by an equal, internally calculated step (thereby maintaining their difference) |
| W      | Widen the range between the `vmin` and `vmax` by an internally calculated step                                     |
| S      | Narrows the range between the `vmin` and `vmax` by an internally calculated step                                   |