Can anyone tell me if it is possible to modify the structure of an existing table in SQL Server using InterDev? When I right-click on a table name and select "Design", I get an empty box whose title matches the name of my table, but there are no column names or properties to view/amend, this is despite the fact that when I right-click on the empty box, my drop-down menu gives me options for column names, column keys etc..

Can anyone tell me what I'm missing?