While configuring attributes in ArcGIS Online's pop-uop configuration dialog, currently users must select one field at a time to do one of the following tasks:
Re-order fields up or down
Format (for double fields, this asks how many decimal places to show)
"Use 1000 separator"
ENH request: ArcGIS Online's pop-up configuration should allow users to select multiple fields at a time (regardless of field type) and allow for formatting, thousands separator, and moving the multiple fields up/down at the same time.