Myriad v2 (from Exostiv Dashboard version 1.10.0):
The keyboard shortcuts are configurable.
To access and adjust the shortcuts list and configuration options, click on the ‘wheel’ icon in the waveform viewer icon bar…

and access the keyboard controls:

Myriad v1 (up to Exostiv Dashboard version 1.9.5):
The shortcuts are fixed.
Here is the list of Myriad v1 waveform viewer keyboard and mouse shortcuts:

Shortcut	Action
m	Find next marker
SHIFT + m	Find previous marker
l	Find previous marker
t	Find next trigger
SHIFT + t	Find previous trigger
r	Find previous trigger
Left arrow	Scroll left
Right arrow	Scroll right
Up arrow	Scroll up
Down arrow	Scroll down
f	Zoom full
i	Zoom in
+	Zoom in
SHIFT + i	Zoom out
SHIFT + +	Zoom out
-	Zoom out
o	Zoom out
Mouse scroll	Scroll up / down
CTRL + mouse scroll	Zoom in / out
SHIFT + mouse scroll	Scroll left / right
Hold CTRL + mouse select	Select zoom window (release to zoom)
Right click	Open context menu
Left click	Select signal & position marker on pointer
Center click	Select signal