The number in the bracket on the header of the User Hidden Nodes pane shows the number of hidden nodes. In this pane, you can restore the selected nodes to the matrix by right-clicking in the pane and choosing Show Selected Nodes from the context menu, or restore all the hidden nodes by choosing Show All Nodes. To hide the nodes, select a node, right-click, choose the Hide command from the context menu, select This Node Only, This Node and It’s Peers and Nodes That are not Peers to This Node from the sub-context menu.