I have revised zooming by mouse wheel and added corresponding hotkeys.
Now wheel up/down and hotkeys + = - zoom in/out around current mouse cursors.
Shift-Wheel and Control-Wheel as well as Arrow keys are scrolling (arrow keys play different roles in 2d and 3d).
Shift-Control-Wheel zooms in/out in x-axis.
Help 'h' in graph window prints:
<WheelUp> zoom in
<WheelDown> zoom out
<Shift-WheelUp> scroll up (in +y direction)
<Shift-WheelDown> scroll down
<Control-WheelUp> scroll right (in +x direction)
<Control-WheelDown> scroll left
<Shift-Control-WheelUp> zoom in only the x-axis
<Shift-Control-WheelDown> zoom out only the x-axis
+ `builtin-zoom-in` zoom in
= `builtin-zoom-in` zoom in
- `builtin-zoom-out` zoom out
Right `scroll right in 2d, rotate right in 3d`; <Shift> faster
Up `scroll up in 2d, rotate up in 3d`; <Shift> faster
Left `scroll left in 2d, rotate left in 3d`; <Shift> faster
Down `scroll down in 2d, rotate down in 3d`; <Shift> faster