How to add cancel button while clicking the Edit link in View?
You can make use of the Content type extras module


label on manage field forms Add a 'Cancel' button to node edit forms
Ability to set node title visibility when viewing node Ability to
hide title of front page (takes precedence over content type setting)
Ability to add form submission buttons to top of 'Manage fields'


Or you could use the more buttons module


  MB provides a additional Create new action.
  
  This action can used as tab in addition to the node View or node Edit
  tab. This action can used as action link on the node edit forms. 


MB allows to use own values for:


  Cancel button,
  Save and continue button, Save and create new button
  Create new tab