Add Special Key Points
Function Description: Manually add special key points on the pipeline line vector, supporting custom key point types.
Parameters

Parameter Dialog
- Key Point Type: The type of key point to add. The key point type is recorded in the Type field of the Pipeline Key Points layer.
- New Type: Create a custom key point type. Click the Add button to immediately add it to the dropdown list of Key Point Types.
Steps
- Click the Add Special Key Points
button under Extraction.
- Left-click on the pipeline line. A pipeline key point will be added at the clicked position, with the type specified in the parameter dialog.
- If the left-click is directly on an existing pipeline key point, the type of the selected key point will be updated to the type specified in the parameter dialog. Note: Only the type is changed; no new key point is added.