Autodesk Inventor iDoor Tutorial
Page 3 - Finishing the Layout Sketch and Adding new
Parameters
The
next step is to add the two dimensions that will fully constrain the
rectangle. grab the General Dimension 
tool from the
Constrain Panel 
panel
of the ribbon and select the
right line of the rectangle and pull off to the side and click where you
want the dimension placed.The Edit Dimension dialog box will
open up. Click the little arrow to the right of the dimension entry area to
get more options, then select List Parameters as shown in
the image to the right.
A list of all of the parameters you entered earlier will pop up, and you need to select Opening_Height, then click on the little green arrow to accept your choice.
If the rectangle you drew was small, it will now zoom up to the 24" that the
Opening_Height parameter was set to earlier. The fastest
way to zoom back out is to use your scroll wheel to do so (if applicable),
otherwise use the Zoom All 
comand located on the Navigation Toolbar (the
vertical toolbar below the View Cube). The Zoom All command is also
available on the Navigate Panel 
of the View Tab. Now would be a good time to
set the views for this model. If you dont know how, there is a quick
tutorial called
Creating New Default Views In Autodesk Inventor that you can use to do
so.
Now that full rectangle is in view again, grab the Dimensions
tool again
and select the top line and click to place the dimension. Repeat the
procedure to add a parameter to the dimension, this time using the Opening_Width
parameter. If you are using a white background, your rectangle
should be blue, and it should say ' Fully Constrained 
' in the lower right
hand corner of the screen.
Now we need to add another Parameter
.
Open the parameter window and create a new parameter called
Insert_Gap with the equation .0625. The Unit and
Export boxes can be left blank, and the Comment is
Company Standard.