2011

Table Of Contents
dimensions, the second extension line is counterclockwise from the first. In
the following illustrations, 1 is the first extension line origin and 2 the second.
If you place text manually, you can place the dimension text anywhere along
the dimension line, inside or outside the extension lines, as you create the
dimension. This option provides flexibility and is especially useful when space
is limited. However, the horizontal alignment options provide better accuracy
and consistency between dimensions.
Position Dimension Text Vertically
The position of the text relative to the dimension line is referred to as vertical
text placement. Text can be placed above or below or centered within the
dimension line. In the ANSI standards, centered text usually splits the
dimension line. In the ISO standards, it is usually above or outside the
dimension line. For example, ISO standards permit angular dimension text
to appear in any of the ways shown.
Other settings, such as Text Alignment, affect the vertical alignment of text.
For example, if Horizontal Alignment is selected, text inside the extension
788 | Chapter 29 Dimensions and Tolerances