There are many modifiers that can be used for selecting features in ArcInfo. What follows is a list of those used on the Select menu and in the Ensemble Editor. Note that not all of these options are available from every menu.

• ONE specifies that a single feature will become the currently selected set.
  1. Press <1> or click <LeftMouseButton> to select an item.

• MANY specifies that more than one feature will be selected.
  1. Press <1> or click <LeftMouseButton> to add an item to the selected set.
  2. Press <9> or click <CTRL-RightMouseButton> to stop selecting.

• BOX selects features which fall within a specified rectangular box.
  1. Press <1> or click <LeftMouseButton> to define the corners of the box.

• POLYGON selects features which fall within the boundary of a specified polygon.
  1. Press <1> or click <LeftMouseButton> to define the vertices of the polygon.
  2. Press <9> or click <CTRL-RightMouseButton> when finished.

• SCREEN selects all features currently visible on the screen.

• PATH calculates the shortest path between two specified arcs and selects those arcs falling along the path. Available for arcs only.
  1. Press <1> or click <LeftMouseButton> to select the beginning and ending arcs of the path.

The BOX, POLYGON, and SCREEN modifiers can be further refined with the following options:

• WITHIN specifies that only those features that fall completely inside the selection area will be selected. This is the default.

• PASSTHRU specifies that features which are only partially contained within the selection area are also selected.