To change the display period on the X-axis for a chart simply navigate to the options tab while you are creating or editing a chart. 

Advanced Tips:

 - If you are tracking a metric weekly and selecting monthly or quarterly display periods, you will not get 100% accurate data as weeks are able to straddle months and quarters.
 - We are automatically summing metrics when you are rolling them up to different period. E.g. if Revenue is 100 for Jan, Feb and March then Revenue for Q1 would be 300. However, if you are tracking a metric that should not be summed (e.g. Active Users) then you'll want to use the "Last" function in the metric settings section. 

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