Setting Up a Drawing - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 76

NOTE Drop-down lists are lists of options with only the selected
choice displayed when the list is closed. When you click the arrow, the
list opens. When you make another selection, the list closes and your new
choice is displayed. When an item on the list is selected and is the focus of
the program (indicated by a blue highlight), you can change the available
options using the scroll wheel on a mouse or the up and down arrows on the
keyboard. You can choose only one item at a time from the list.
5. Click the down arrow in the Precision drop-down list in the Length
area to display the choices of precision for Architectural units (see
Figure 3.3). This setting controls the degree of precision to which
AutoCAD displays a linear distance. If it's set to 1 ⁄ 16 ″ , any line that is
drawn more precisely — such as a line 6 ′ -3 1 ⁄ 32 ″ long — when que-
ried, displays a length value to the nearest 1 ⁄ 16 ″ . or, in the example, as
6 ′ -3 1 ⁄ 16 ″ . However, the line is still 6 ′ -3 1 ⁄ 32 ″ long.
If you change the precision setting to 1 ⁄ 32 ″ and then use the DISTANCE
command to measure the distance between two features, you'll see that
its length is 6 ′ -3 1 ⁄ 32 ″ .
6. Click 0 ′ -0 1 ⁄ 16 ″ to maintain the precision for display of linear units at 1 ⁄ 16 ″ .
FiGuRE 3.3 The Precision drop-down list for Architectural units (left) and
Decimal units (right)