The description is not clear, just upload the picture

When I hold down the left button of the mouse and grab the image and pull it down

Then release the left mouse button and it will go back to the top, just like the first picture
The above is the situation of my atom editor minimap now, and what I want is to pull down to the bottom, after releasing the mouse , he is fixed at the bottom and cannot rebound

I looked at the configuration of minimap, but unfortunately I didn’t find anything relevant (maybe there is, but I just didn’t understand it...)

Please give me some advice from friends who use atom editor
Thank you very much