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I am working on a line chart which is like below -
I need to highlight the dates/area on which we ran the ad-campaign as shown in the image (15-18 March). I don't have those dates coming in from source so I tried adding reference line with hardcoded values etc. but could not get it done.
How can I achieve this? Please see my attached workbook which is on sample superstore data. How can I highlight the area from 20-May to 23-May?