Revisiting Stacks Customisation:
I have been messing around with customization when I came to my dock… I love the new shelf, so there was no work to be done there then I looked at my stacks. There ugly with all those different icons that come to the front. So I sought out to fix this. Heres what I ended up with…

And heres how I did it… 1. I made a new folder within the stack 2. I renamed it 0 (zero) so it will sit at the front. (make sure the stacks are sorted by name) 3. That made some uniformity but I needed more so I used the icons from my computer. 4. this is done by copying the icon from its location in this case downloads, applications, and documents. Simply find the icon you want, open Info (right click get info or command + I) then click the icon in the upper left of get info and watch in highlight then copy it with command + C. Then go to the folder you want to change the icon (the stack folder named zero) then do the same (get info, highlight) and just paste with command + V.This may be a little confusing at first, if you need help changing the icon search changing icons on a mac in google it might help a little more. Leave comments and questions I can help there too.