Edit button in list type dashboard

Dear Saira,

What I recommend to do is to find out how the "edit" button is already added on a existing dashboards. 

You can use chrome debugger and try to search the name of the button in the entire client code (ctrl+shift+f), so you will find where it is added and how.

After the code analysis, something similar can be implemented for your custom object . 

By the way, each record in the list can be opened and edited just by clicking on its name http://prntscr.com/q35ybn You can also use the logic on opening pages from the dashboard to embed it to the edit button.

Best regards,

Dean