You can remove objects collections from the analysis to make it more readable.
You can redisplay the removed collections at once by re-analyzing your model in any of the following ways. If you want to redisplay individual collections use the Impact Analysis Objects or the Lineage Analysis Objects dialog box (see Controlling the display of object collections).
[from the IAM] Select to redisplay all the collections in the model or right-click an object in the Browser or in the diagram, and select Re-Analyze to redisplay the object's collections.
[from preview] Click the root node or an object in the tree and click the Re-Analyze tool to redisplay all the collections in the model or only the object's collections or right-click the root node or an object in the tree, and select Re-Analyze.