title: Indicating dynamic nature of certain parts of dataset in Datastudio charts
body: <p>I am using Data studio for the visualization of a data structure that automatically updates on a weekly basis. The data structure is dynamic in a way that indices that have a time-stamp that is higher than 3 months ago are susceptible to certain change. So in a time-chart: frequency values can change in this "recent" time-slot. Coming from Tableau, there are many options to indicate this in the visualization/dashboard such as making this 3 month area in the chart grey or the bars grey. However, I did not find any solution in Data studio to do it this way. I have thought about making a grey element behind the chart. However, this would be a static element that won't change size based on chosen time-range (thus rendering it not useful). I would like to know if there is a way in Data studio to reach this goal or something similar to this.</p>