When I tried to use your software on site with a laptop equipped only with a touch pad, I couldn't zoom out.
One very good and intuitive approach would be to allow window zooming (=user drags a rectangle and after release software zooms to that area). It would be more accurate anyway. LeCroy uses this approach at least in WaveSurfer series, works fine with the touch interface. Of course this might be in conflict with current panning functionality, which should be overcome some way (such as using a modifier key or different mouse button).
Long term, I'd love to have quality tablet support (no mouse or keyboard required for all of the features).
However, I don't think we can make this a priority for a while. Right now, we're gearing up for a pretty large change to the front end. We're working on hiring for help with that right now.
Similar suggestion for using the Sale Logic on a Surface 4 Pro with a touch-screen only interface.
Good news! This is already supported. The up & down arrow keys and the plus & minus keys will do this now, and you can use the arrow keys to scroll left and right. Hold control to increase the step size.
These two articles cover the rest of the keyboard shortcuts, and all of the methods for interacting with the display.
Yes - Please, pretty please! My tablet, which would be nice for analyzing in the field (or the garage workbench), only has one USB port: So either it's zoom and a mouse - or the logic. No practical workarounds for this as far as I can see.
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