Hi Ben B,
You are partially correct. First of all, please notice that you are only able to select the “Additional Columns” option from a dropdown Field. The issue you are running into is that the dropdown menu is not currently visible in your grid. In order to enable the dropdown selection in a grid, you must go to edit your grid, then go to “step 5 of 9, Allow Editing”. By making sure the option for “editing takes place directly in the grid” is selected, the dropdown menu will now be available. Now if you go to view t this screen select the dropdown in the row and field you want to view the additional columns for and they should now show up.
If you do not wish to allow editing from the grid, you can add a dropdown field below your grid to represent this column, then after hitting the “Select” link from a record in your grid (if not already there, edit your grid, and in “Step 2 of 9: Grid Columns”, insert a “Link” called “select”). Then, edit your new dropdown field, go to “Step 4 of 6: Dropdown Choices”, and add the additional columns you want to be viewable when the dropdown menu is selected.
You also asked what the reason is that you must select the “ListOrder” field to be the first column for this dropdown. With Dropdown lists the field in the first column MUST be a unique field, there is no getting around this. I am not exactly sure of your setup, however it might be possible to make the column you want displayed first as unique, but again, it all depends on how this table was made.
- Method_Ben