You can change which month is the focus month for the variance analysis by using the drop down menu on the month on the right of the table:
You will only be able to select a month as far back as the start date in settings (see this article for more details),
Note: The commentary you add relates to the focus month you are viewing and will be saved to that month.
If any of your balances have changed, we will notify you which months are affected inside this dropdown using a red dot:
You can find more details on how to manage notifications here