In August 2020, we overhauled the Calculated Graph feature to improve performance.
Rather than relegating calculated graphs to background servers (so as to avoid server overload for all users), envisage now calculates these values in realtime using database queries specific to this task. The result is that the graphs update in realtime.
This means faster load times. It also means that, in most cases, a change in any of the children graphs will automatically display in the parent graph.
Therefore we removed the "recalculate" option as it is no longer needed.
However, on the rare occasion you might want to force a reload of the graph, we've added that feature in the Graph Menu as shown below.
To read more about the speed improvements, read our blog article, Fast As Lightening.