They get up so that they may eat. They stand up and begin drinking. They stand up in order to use the restroom. However, when mature deer do graze during the day, it is often within a distance of one hundred to one hundred fifty yards of their sleeping location.
Morning is often the time of day when deer travel the most distances in a given hour. This is likely due to the fact that the animals are attempting to return to the safety of their home ranges before it gets too light. I have had the privilege of observing hundreds of deer throughout the day, particularly the ones that make their beds in the grove that is located back our home.