You have picked up on a subject that we are currently looking at. Our reports dashboard is due for re-structuring and this will include more extensive and customisable date ranges.
Our early designs are fairly exciting and will definitely be of benefit to you and your restaurant (we hope)
I will update you when we know more about the date on which these updates will be released.
It would be very helpful if on the dashboard we were able to change the date ranges on the data graphs. This allows an easy to understand view of the business over a greater period of time building a more indepth picture of business patterns