The Select Range Tool allows you to select parts of the mesh based on the coordinates in the 3D Viewer Window.
Range: Add a selection by entering the X,Y, and Z coordinates enclosing the area you want to select. You can also use the modifiers on the transparent preview to change the area of mesh selected.
Add Range: Add another area of selection without deselecting your current selection.
Deselect Range: Deselect an area of selected mesh.
Subset Range: Choose only a part of a existing selection to keep selected. The overlap between the mesh already selected and the transparent preview is the mesh that will remain selected.