I'm a middle school student and have just started learning about ArcGIS. I found a free census block layer and added it to my map. I wanted to add another field to the table for this layer and display that new field as my labels. I don't seem to find a way to edit the table, and not even after I copy / and saved it as my own layer. I'm using ArcGIS Online trial version.
Could somebody point me to the right direction? Thank you!