These two dialogs are used to show additional elements that are adjacent to the selected elements. The number of adjacent elements shown is determined by the number of layers of surrounding elements that you specify. For example, if you have selected a single node and want to also select the triangles and nodes immediately surrounding it, you can use this dialog to do so. To access this dialog, click 
().
Dialog elements
- Expand current selection by number of levels
- Specify the number of adjacent model elements to expand your mesh entity selection to.
Enter 1 in this box to expand your selection outward by one layer of contiguous elements. Enter 2 to expand your selection by two elements, and so on.
Note: The layer(s) of surrounding elements will include mesh elements (for example, nodes and triangles) only. - Put expanded entities into a new layer
- Places the new entities in a new layer. Note: After clicking Apply , the new layer will be added to the Layer pane.