Both plugins now offer keyboard shortcuts for convenient navigation and control of the oscilloscope. This is especially useful for the Zen mode (Pro version only) when the controls on the bottom are hidden to make space for the signal window. A list of keyboard shortcuts is now included on a help page in the plugins.
The free version of Wave Observer now has the same tab layout as the premium version, and the update also includes some other minor changes/fixes.
More information: Press Play