Choose how to update the selected Template in the Control Property view. If no Template was selected when this Import Wizard was activated, then the only applicable option is Create new Template. The default option for overwriting an existing Template is to Append new items.
The option "Copy items to Window Clipboard" is used internally by Control Architect functions and its Clipboard content has no real value or purpose to the user. When invoking this Wizard view from the "Create Control Conversion Project" Workflow view this option is automatically chosen and cannot be changed. The Control Property set defined here is copied to the Window Clipboard and its contents is read to develop the list of target Control properties.