Columns Definitions can be deleted from the Columns Navigation Pane if they are no longer required.
Prior to deleting any Column Definition, us the Where Used option to check that the item is not currently associated with any Report or Input Definitions. In this instance, you will not be able to delete the Column Definition and will receive a warning message indicating that the item is used elsewhere:
Only those items which are not associated to any Report or Input Definition will be deleted.
To delete a Column Definition:
1. Click on the Columns bar to open the Columns Navigation Pane.
2. Select the Columns Definition to delete.
3. Click
on the Delete 
icon. You will
receive the following prompt to confirm your deletion:
(You can also simply drag the
selection off the workspace.)
4. Select Yes to confirm your deletion.
5. If the item is currently in use, you will receive a warning message and you must disassociate the item from the Report or Input Definition which uses the item.
6. Select OK to close the warning message.
Additionally, you can delete multiple Column Definitions and/or Column Definition Folders from the Columns Navigation Pane.
Multiple items can be deleted where all the items are at the same level in the Navigation Pane’s tree. If a Column Definition and a folder are selected for deletion, then the folder must be empty.
To delete multiple Column Definitions:
1. Click on the Columns bar to open the Columns Navigation Pane.
2. Select the Columns Definitions to delete. Select more than one item using the Shift key and mouse-clicking on the items.
3. Use the right-click to select the Delete option from the pop-up menu. You will receive the following prompt to confirm your deletion:
4. Select Yes to confirm your deletion.
5. If the item is currently in use, you will receive a warning message and you must disassociate the item from the Report or input Definition which uses the item.
6. Select OK to close the warning message.
Note: If you do not wish to receive confirmation messages on deletions of Prospero items (Column Definitions, Line Definitions, Report Definitions, or Tree Items), check the “Do not show this message again” checkbox. You can re-enable confirmation messages by selecting the “Prompt before deleting” checkbox on the Local Settings Options screen.