How can I add more columns into the child table. I have removed the unused space to the left of the child table, now I need to increase the no of columns beyond 9.
11 is the total that you can increase up to. You would go to Customize>select the field you want to display, check the box to show in grid and then scroll down and assign a value in columns at the bottom. All the values must be 11 or less when added together.