Looking for logging into the Change Screen El Capitan site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Change Screen El Capitan site. After that you can login as usual with your login credentials.
https://www.youtube.com/watch?v=GLt1xdhlVC4
http://osxdaily.com/2015/11/02/customize-login-screen-wallpaper-os-x-el-capitan/
https://www.tekrevue.com/tip/replace-os-x-login-screen-wallpaper-el-capitan/
https://www.macplanete.com/astuces/19104/login-screen-mac-el-capitan-modifier
https://www.maketecheasier.com/change-login-screen-wallpaper-mac/
https://www.howtogeek.com/howto/29503/how-to-change-the-logon-background-in-os-x/
https://discussions.apple.com/thread/7272791
https://discussions.apple.com/thread/7696404
https://support.apple.com/en-us/HT202036
https://discussions.apple.com/thread/7258021
https://www.macworld.com/article/3128967/macs/how-to-change-your-login-screen-in-macos-and-change-it-back.html
https://apple.stackexchange.com/questions/241785/change-language-in-os-x-el-capitan-in-login-menu
https://apple.stackexchange.com/questions/281825/change-background-login-screen-in-macos-sierra