The Insert, Append, and Add Child commands are enabled when the current selection in Grid View allows a component to be, respectively, inserted, appended, or added as a child.
•Insert inserts a component of the same type as the selected component in a grid row above the selected component.
•Append appends a component of the same type as the selected component in a grid row below the selected component.
•Add Child adds a new child component as a last child. The type will be the same as that of the child that was previously last.
For more information about editing JSON document structure, see Editing JSON Document Structure.