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matplotlib.axes.Axes.start_pan
- Axes.- start_pan(x, y, button)
- 
    Called when a pan operation has started. Parameters: - x, yfloat
- 
           The mouse coordinates in display coords. 
- 
           buttonMouseButton
- 
           The pressed mouse button. 
 NotesThis is intended to be overridden by new projection types. 
Examples using matplotlib.axes.Axes.start_pan
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 https://matplotlib.org/3.4.3/api/_as_gen/matplotlib.axes.Axes.start_pan.html