Please refer to the image below, it maybe too huge for your monitor, im sorry. I have zoomed in quite alot. I clicked the edit collider button then i can see a tiny pentagon shape appear, but i wasnt able to do anything to it, tried pressing shift, control, or alt key, all does not work. I even zoomed in another 100-1000 times until i only can see 1 corner of the pentagon, still i couldnt adjust or do anything to it. What did i do wrong ? thanks.