When X and Y axis are enabled to show slider - please change mouse wheel behavior to ONLY allow zoom-in/out on X axis. Shift + Wheel will toggle zoom on Y axis.
This will preserve behavior that is common practice across many other platforms. (Honestly SPOTFIRE lacks a lot on user Experience level).
Also, when Trellis is enabled with panel view, + X-axis is enabled with zoom slider, please give priority for X-axis zooming by the mouse wheel.
In trellis view with multiple panels - enable PgUP / PgDown to be used to navigate between trellis panels (instead of currently mouse wheel being used for this, which messes up data review / UE).