Proper tags for the time series returned by flux

Hi is there a way to rename the results of the returned results.
I compare the same data from couple of dates with the use of the timeshift and they all look the same in the grafana graph. Need remember the color for each day to make it aout
How do I rename them as (energy Today, Energy yesterday, in the flux
There used to be Alias option the old language, is it replicated in flux?