Ability to reset date/time field
It's not possible to reset/clear value to default (date and time control).
It appears that this attribute needs to be set when the DB field is first created. Whenever I create a new record, the default date is today's date, and this can be changed. I use this field property in several of my DBs, but there does not seem to be any way of changing this field property later.
Field properties should be able to be redefined after the DB is functional and populated with some data.