Creating an Opening with a Standard Opening

	This task explains how to create an opening with a standard opening.
	1.	With your 3-D session open, click the `Opening` button to display the `Opening` dialog box.
	2.	Select from the `Category` drop down list. The name of the opening is assigned automatically, using the object naming rules. If you want to assign your own name to the opening, uncheck the `Automatic` box and enter a name.
	3.	In your 3-D session, select the objects (plates, stiffeners). The `Applied To` field shows the objects to which the openings will be applied. When you select more than one object, the selected number of objects display as `elements` in `Applied To` field.
	4.	You can remove and replace objects that you select. Click the button beside the `Applied To` field and the `Elements` `List` displays, listing the objects you selected. Select an object on the list that you want to replace, and click the `Replace` button. Select an object in the 3-D session, and this object displays on the `Elements` `List` in place of the original one. You can also remove objects from the list. Select the objects you want to remove, and click the `Remove` button. The selected objects are removed from the `Elements` `List`. Click `Close` when you have made all the necessary changes.
	5.	In the `Method` field, select `Standard` for a standard opening.
	6.	Select the `Standard` `Opening` `Definition` button and the `Standard` `Opening` dialog box displays.
	7.	Select `Contour` and `Position` from the drop down lists. `Contour` is the shape of the opening. `Position` is the strategy used to determine where an opening is placed. An image of the opening reflecting the selected position strategy displays in the dialog box. By entering references for the U and V directions, you can create multiple openings at specified positions. See explanation of the `References` pane below.
	8.	When you select the `Preview` checkbox, you can preview the openings in your 3-D session.
	Use the `Position` tab to define the position of the openings.
	9.	In the `Parameters` pane, change the angle of the contour under `Value` as necessary.
	10.	In the `References` pane, select the U and V rows, and select a 3-D reference object (plane or plate) to define the position of the opening. You can also right-click and select `Select Reference Plane` from the drop down list. Information listed in the `References` pane depends on the `Position` selected. NOTE: You can multi-select references in the U direction and create multiple openings. (The `Elements List` displays whenever you can multi-select, listing your selections.) You can only select one V direction except for `Mid-Dist/Mid-Dist`. `Offset/Offset` - Offset from reference elements in U and V directions. `Half-Height /Offset` - Offset from a reference element for U, then position in V halfway between plate edges. `Mid-Dist/Offset` - Position halfway between two elements for U, and offset from another reference element for V. `Mid-Dist/Mid-Dist` - Position halfway between two elements in U, and halfway between two other elements in V. `Half-Height/Mid-Dist` - Position halfway between two elements in U, then position in V halfway between plate edges.
	11.	You can select `Chain` for references in the U direction only for the three `Mid-Dist` positions. When `Chain` is not selected, you position openings between each pair of references (for example, between 1 and 2, 3 and 4, 5 and 6. Selecting `Chain` allows you to position openings between every reference (for example, between 1 and 2, 2 and 3, 3 and 4, 4 and 5, 5 and 6.
	12.	Change `Offset` values as necessary. The offset is in the direction of the `Side` value. This value depends on the reference object selected. You can click the `Switch Side` button to change the direction from the reference object where the opening will be placed.
	Use the `Contour` tab to select the contour parameters of an opening.
	13.	On the `Contour` tab, an image displays the current contour parameters. Select a row and change the dimensions of the contour (under `Value`) as necessary. NOTE: You can only change the parameter values if the `Status` is `Unlocked`.
		Your 3-D session displays the changed values when the `Preview` checkbox is selected.
	14.	Click `OK` when you have created the required openings.
		The following displays openings when a `Mid-Dist/Offset` position strategy is used. Three pairs of references in the U direction are selected to create multiple openings. (`Chain` is not selected.)
		You can double-click an opening in your 3-D session, and edit certain information. You can modify information only for the selected opening (you cannot multi-select). You cannot change the position strategy of the opening.