Didn't this work with 0.9.5?
Anyhow, when using a laptop there is usually just the touch-pad and no mouse. And no mouse == no mouse-wheel to easily zoom to an area of interest.
Hmm, appears to be broken indeed. I'll fix this for the next release...
Issue #132: re-enable click-to-zoom again.
- double clicking in the signal diagram zooms in;
- use alt or shift + double click to zoom out.
If you would like to give it a test-drive, you can go to https://drone.io/jawi/OLS-client/files and download the latest snapshot...
Works for me.