I have not been able to zoom in on the axis of histograms as much as I would like. For example, the range of one particular x axis initially is from 1272800000 to 1273280000. This histogram will only let me zoom in to a range of about 12000. Set range user will not let me zoom any closer. Similar limits are on every other histogram. Is there a reason for the limits, and is there a way around them without reading in less of the data for each histogram?