How to change the upper and lower bounds of the x-y graph or time series graph

I want to use start and end times that I’ve gotten from data and use those as the bounds on the x-axis for a graph on a report. How can I do this? when i try to change the bounds in the time series chart, it won’t let me.

Whatever column in your dataset that you specify as the “Domain Key” for the chart will be used to automatically set your bounds.