I am making a web map application. I have a layer that shares a relationship class with multiple other layers so you can view its information through "Show Related Records", in the attribute table, and in a number of widgets in my application. Currently, when I upload the data the column headings have underscores and the second half of the longer headings is cut off. I want to format the headings so that they look nice and complete in the table, widgets, and related records. Configuring the pop-up changes the headings, but I do not want to have a pop-up enabled for this layer and when I disable the pop-up all of the formatting is deleted and the titles revert back to their messy form.
Edit: If anyone else has a similar problem, I figured out that if you edit the "Field Alias" for the attributes in the file geodatabase in ArcCatalog then they will save and transfer into the AGOL map/application.