The "Now" button should not be highlighted if you are viewing future data
As of Vision 2017 R2, the "Now" button is highlighted green if you are viewing current time or future time. It is not highlighted if you are in the past. This can create confusion if you are viewing future time and think your tags are flatlined.
The Vision team has clarified that this is not a bug -- a green "Now" button just indicates that the display is updating. This is not very intuitive. The button just says "Now", so you'd think highlighting it would mean you are viewing "now" data.
While we appreciate the interest the community has for this suggestion, we have decided to decline this item in favor of other high priority work the product needs. Thank you for your feedback, and please continue sharing suggestions for how we can improve PI Vision for you!
The green "Now" button indicates that the values shown on the display (e.g., in singleton symbols, trend legends, and tables are the most recent values at the current time. Trends will show traces of future data, but all numeric values that are shown correspond to "now".