At the bottom right side of the graph tab, you can make a selection for the required timeframe. You can switch between days, months and year. But when you have a default day time frame of 5 minutes, and you go to month or year time frame and afterwards you go back to day it takes the 1 minute timeframe. You have to go to the dropdown menus at the top to select your 5 minutes time frame. It will be nice to be able to keep your default value so that you can work only with the buttons at the bottom right side