at Leads you can see underneath Quick actions:
Add a new task,
Add a new event,
Add a new call,
Send mail
at Contacts you can see underneath Quick actions:
Add a new potential,
Add a new task,
Add a new event,
Add a new call,
Send mail
at Accounts you can see underneath Quick actions:
Add a new task
Add a new event
Add a new call
My question is : How do I Add/Edit Quick actions ? For example how do I add 'Send mail' underneath the Quick actions of Accounts??