Android Chrome - shortcut icons shown on Chrome home page there are up to 8 shortcuts on the android chrome homepage. How do I specify which web pages I want them to link to?
You can't edit the shortcut manually. The workaround to add a shortcut is:

Step 1: Remove one that you don't want.
Step 2: Open a new tab, type/paste the URL of the webpage you want, and go to that site.
Step 3: Repeat Step 2 once or twice more. The next type you open the homepage, the webpage shortcut will be added/listed.