Update column value in all selected rows with value from first selected row

[Eric_Schwartz]

Hello,
I frequently turn to the backend Google Sheet to update a single field across a number of selected records. Is there an example of a similar workflow using AppSheet?
Suggested Workflow:
1 Select a model record
2 select the target records
3 Value from the predefined field is copied across all selected records.
Better still, open a dialogue to select the field name to copy across all selected records?
Thanks in advance