Form2Content forms are used to collect data to generate Joomla articles. Each content type has it's own form. Each form can have as many fields as you like. You can access the Fields Manager by clicking on the in the Content Type Manager. Please read about article templating on how to get the data from the forms into your Joomla article.
File upload field
White-list / black-list function
F2C Cheat-sheet
An overview of all template parameters (placeholders for your form data). These are used in your F2C intro and main template to parse the data from your submission forms into the Joomla article.