I updated the Garmin Screens Excel file that @ratz originally created for the Edge 530 for the Edge 1040 - sharing here via DropBox
This lets you figure out screen layout on your computer before setting them up on your Edge 1040.
If you find any bugs let me know and I will try and fix them.
Note: I just uploaded an updated version - let me know if this breaks the link - that includes the ability to list ConnectIQ Data Fields you’ve downloaded. To be able to select these, go to the “Data Fields” worksheet, and add in your Connect IQ data fields in the ConnectIQ_DataFields column - Column B. Delete WindField if you don’t have that installed.