Make it obvious that single-timestamped values apply to the end of the time range
Gauge, table, and value symbols are sometimes used to show values that have a single timestamp (as opposed to, say, the maximum value in the time range). PI Vision always uses the end of the time range as the timestamp. I feel that this should be communicated more clearly when the user is using any PI Vision display. Currently, I must explain this to every new PI Vision user, since it is easy to accidentally assume that the start of the time range is used instead.
I'd even expand this to ask if they could select, min, max, avg, start or end.