How to add a Form:
Just drag & drop a Form icon from menu to the designated location
How to Edit Form:
1. Click on Form Properties
2. Change Form Settings in Option panel
3. Click Apply
How to Remove Form:
1. Click on Form
2. Press Delete button on your keyboard or Click Remove in Option panel
Form sending failed. (+ SMTP Enable)
In most cases this error appears due to the fact that the server cannot connect to SMTP server. Please refer this topic for more details.
Also you need to ensure that you specified correct SMTP data.