No way to specify option for start_date

When using Event Views I am trying to list all events of a certain type that are happening in the next 2 weeks. I was trying to create filters based on start_date between now and now + 2 weeks. When adding a filter for start_date the inline help claims "Enter 'now' to use the current time. You may enter a delta (in seconds) to the option that will be added to the time; this is most useful when combined with now." so for the value I enter 'now', but there is no textfield under the "option" column. Is this just not implemented yet or am I supposed to implement the value as now+1209600 (which did not work)

Thanks