Create browser folders and use them based on your design needs.
Right-click in your browser or graphics window and select Create New Folder. You may have to clear your browser node selections to make the option available. Also, you can right-click the top browser node and select Create New Folder. The two processes are equivalent.
Select assembly browser nodes, right-click and select Add to New Folder. To add multiple nodes simultaneously, you can select nodes in a contiguous or non-contiguous group then add them to the new folder.