vertical | no clip | symbol w/h ratio and margin '40%!'
        
        vertical | no clip | symbol w/h ratio and margin '40%' (notice 0 value)
        
        vertical | clip | fixed repeatTimes
        
        dataURI | symbolSize responsive (TRY RESIZE)
        
        horizontal | clip | positive | rotate
        
        horizontal | clip | negative and positive symbolBoundingData | no animation
        
        negative symbolMargin | symbolPosition (check whether overflow)
        
        repeat strategy | dynamic data | axisPointer.type 'none' label show