The hole is automatically created in the center of a circular face. After you create a hole, you can change its position, direction, and size.
To change a center hole,
You can modify a center hole only if Create feature in the Preferences dialog box is On. Click (dialog box launcher) in the Feature group to open the Preferences dialog box.
1. Click Part Library and then, in the Feature group, click the arrow next to Center Hole.
2. Click Modify center hole in the Modify section. The Center hole dialog box opens.
3. Select a center hole in the viewport or Structure Browser.
(dialog box launcher) in the Feature group to open the Preferences dialog box.
Center Hole.
Modify center hole in the Modify section. The Center hole dialog box opens.
to complete the operation.