The Online Express Event Form offers donors the option of making a donation in addition to the event registrations they purchase.   

 User-added image

 If the user selects this option, a field will become available within the Event Form below the event registrations.

User-added image
As noted on the form, these additional donations will not appear on the event record, but will instead be linked to the constituent's record as a gift and will contributed to the fund selected by the user.

**Please note that donors MUST purchase an event registration to be able to make an additional donation. Therefore, the use of this function does not make the form act as both a Donation Form and Event Form.