From the Authoring section of the action bar,
click Edit Features.
In the Manufactured Part panel, select the Opening Preparation tab.
Change the Opening Type to Tabbed.
Select a tabbed opening in the list and click to edit lead in lead out values.
If required, you can edit the properties of a tabbed opening. Location of
the First Tab - Click Select Start Point selector
and select a point on the opening contour from the Auxiliary viewer. The selected point
becomes the starting point of the first tab of tabbed opening.
Note:
The dialog has changed from the video. You can modify the parameters of the tabbed
opening as shown.