How do i email an invoice to customer?

1. Sales Order to Sales Invoice

Menu Path>> Sales Module > Sales Order List > Select a Sales Order >Menu > Process > Invoice

2. Email Invoice From Backoffice 

Email can be sent in several ways:-

Method 1: Menu Path>> Sales Module > Sales Invoice Listing> Menu > Email Transaction

Method 2: Menu Path>> Sales Module > Sales Invoice List > Email Button

Method 3:  Menu Path>> Sales Module > Sales Invoice List > Select a Sales Invoice > Email Button

Method 4:  Menu Path>> Sales Module > Sales Invoice List > Select a Sales Invoice > Menu > Email Transaction

3. Related Reports

Menu Path >> Sales Module > Report