[How many times a user logged in during a period of time?]

is there a possibility to check how many times a user has logged in during a period of time, e.g. last 3 months?

Also, is it possible to check the exact time when the user logged in?

[Pie HTML5 Chart doesnt display low values]

Thank you very much for your responses. I have tried that one but it didn't help. Actually when I have a "huge" number of slices. e.g.10-11 of them, then those with the values 0.01 and 0.05 don't appear.But, when there are only let's say 5 slices in the chart values are displayed.
P.S. I use version 8.0.0.

[How to stop report page from changing when refreshed?]

I am wondering if anyone figured out solution to this "problem"?

[Pie HTML5 Chart doesnt display low values]

When creating a pie chart in Jaspersoft Stduio (HTML5 Charts) I have a problem that the pie chart does not display low values ​​(0.16,0.05 etc) Is there a way to display them somehow? Thanks in advance.