Change Zoom in / out buttons

[hoechenberger]

The "Zoom in / out" buttons are kind of arbitrarily labeled, considering that just left of them in the toolbar there are buttons for "zooming in and out" of time and channels.

What these buttons do is increase or decrease the displayed amplitude, and I think we should label them accordingly: "Increase / decrease amplitude". The corresponding icons should be waves with a high and with a flat amplitude.

[larsoner]

That or maybe a vertical shrink/expand would be even clearer. There is probably a standard icon for that already

[cbrnr]

I'd also prefer zoom buttons with either horizontal or vertical indicators. I'm using those in SigViewer.