I have always fed my boxers 3 times a day.
I do my best to coordinate feeding times with a 2 hour window before/after a big exercise session such as hiking, walking, or playing.
If it is impossible to fit the 2 hour time span in before/after a walk, I will skip the feeding and just give 2 feedings that day.
On the occasions when I need to skip a feeding, I do not increase the size of the meal and feed the same amount I usually feed.
The great majority of the time though, I give 3 feedings per day.
My reasoning for 3 feedings is in line with what Luvmiboxers wrote above; I am trying to minimize the risk of bloat.
Your boxer is absolutely gorgeous!!