The default selection ribbon is displayed only when nothing is selected. After you select an object, the selection ribbon is replaced with a ribbon bar for editing the selected object.
To find out the name of an option on the ribbon, pause the pointer over an option and read the ToolTip.
Inside
Specifies that elements inside the fence are selected.
Overlapping
Specifies that elements overlapped by the fence are selected, as well as elements inside the fence.
Top Down
Specifies that groups of elements are located as opposed to individual elements in a group.
Bottom Up
Specifies that individual elements in a group are located as opposed to the whole group.
Expand
Displays another ribbon depending on the items that you selected on the drawing sheet. This button appears when you select ten or more items on the drawing sheet. When you click it, another ribbon appears.
The options that appear depend on the types of elements that you selected. For example, if you select eleven lines, then the Line ribbon appears. If you select several types of items, then only the common properties for those types of elements appear on the Select Tool ribbon. For example, if you select nine lines and a circle, then the ribbon displays the Style, Line Type, Width, and Color options. For more information about the options that appear, see the Help topic for the selected element's ribbon.
If the items that you selected have no common properties, then no options will appear if you click Expand. For example, if you select a dimension and ten lines and then click Expand, a ribbon does not appear.