echart- line chart, the data are too many want to become a mouse to drag and scrolling effect? The default circle and how to customize the data circle style

1. Too much data how to do? ?? want to drag, to slide

dataZoom: [
　　{
　　　　type: 'slider',
　　}
]

 

dataZoom: [
　　{
　　　　type: 'inside', 
　　}
]

2. circle how to draw? With a picture, click on the legend will result in the display, restore the default circle (dropout)