When Glide apps become more complex, it can be hard to know where data from a spreadsheet is being used! It would be great to have an icon in a column header in the Data Editor, that has a tooltip that has a list of where that specific of column of data is being used. It could be directly in the app, or maybe it’s helping out another column.
When your app gets complex and needs ‘refactoring’ — it could be really helpful to know which columns are being used, and which are stale (you could even grey-out stale columns!).