Hi there.
I am working on a dataset from a previous employee and it appears that all of their 'Area' and 'Acres' data for a polygon feature class were entered manually. So when I create new features, the attribute table doesn't automatically show the area. I assume these fields were created by this user.
![WDMParkPlanner_0-1706824568651.png WDMParkPlanner_0-1706824568651.png](https://community.esri.com/t5/image/serverpage/image-id/93499iA9806C3DC879BC71/image-size/medium?v=v2&px=400)
I'm pretty new to gis work in general and do not understand how I can modify this feature class/attribute table to include a new field that automatically calculates and or shows the area of new polygons I create. Let alone, I do not understand how to run the 'Calculate Field' tool as I do not understand how the 'Helpers' are used.
![WDMParkPlanner_1-1706824705657.png WDMParkPlanner_1-1706824705657.png](https://community.esri.com/t5/image/serverpage/image-id/93500iCE647871884AB295/image-size/medium?v=v2&px=400)
I have other Projects where datasets have things like length and area automatically calculated and it looks like it uses the 'Double' option for field 'Data Type'. I tried adding a field with this double setting in my above feature class and it is not auto calculating the area.
![WDMParkPlanner_2-1706825035941.png WDMParkPlanner_2-1706825035941.png](https://community.esri.com/t5/image/serverpage/image-id/93501i17ECFBC6184B2023/image-size/medium?v=v2&px=400)
I would greatly appreciate any insight!