A device displays a user interface that includes a content area and a deletion control. The device detects an input that includes a contact on the deletion control. In response, the device deletes content in the content area based on a duration and intensity of the contact, including: when the contact was maintained for a first time period without the intensity increasing above a threshold, deleting a first-type of sub-units of the content at a rate that does not vary based on the intensity; when the contact was maintained for a second time period without the intensity increasing above the threshold, deleting a second-type of sub-units of the content at a rate that does not vary based on the intensity; and when the intensity of the contact increased above the threshold, deleting sub-units of the content at a rate that varies based on the characteristic intensity of the contact.