When you create a feature, it is automatically included for manufacturing in the current Setup of the process plan.
Sometimes, it is convenient to exclude a feature from the manufacturing plan without deleting the feature.
The Include In Plan and Exclude from Plan options of the Edit menu toggle the inclusion of the selected feature in the manufacturing plan.
You can use the Process Plan dialog to select which features and Setups to include in the plan, and easily correct any oversights you might make with the include and exclude options.