To move a dimension from one list to the other,
select the name, then click the left 
or right 
arrow button. As you select each name, the dimension is displayed
in the model.
To move all the dimensions, use the double arrow
button 
.
When you open a model, the dimensions are available for editing. In the Dimension Access dialog box, you can control the access to each dimension, to prevent other users from making unwanted changes. You can also edit dimension access to reduce the clutter of unnecessary dimensions in the display.
To control dimension access:
Right-click the part icon at the top of the FeatureManager design tree, and select Edit Dimension Access.
In the Dimension Access dialog box, there are two lists: User dimensions, which can be edited, and Internal dimensions, which are restricted.
Specify which dimensions are visible and available:
To move a dimension from one list to the other,
select the name, then click the left or right arrow button. As you select each name, the dimension is displayed
in the model.
To move all the dimensions, use the double arrow
button .
Click Finish.
When you insert an item that has restricted dimension access, only the User dimensions are visible and available for editing. The Internal dimensions are not displayed, and they are not available for editing.
To make them visible and available again, repeat this procedure, and move the dimensions back from Internal to User dimensions.