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| Dimensioning toolbar:
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| Dimension menu: Diameter |
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| Command line: dimdiameter |
Select arc or circle: Select an arc or a circle
DIMDIAMETER creates different types of diameter dimensions depending on the size of the circle or arc, the options in the DDIM Format dialog box, and the position of the cursor. AutoCAD LT stores the values of the options in the dimensioning system variables DIMUPT, DIMTOFL, DIMFIT, DIMTIH, DIMTOH, DIMJUST, and DIMTAD.
The position of the cursor determines the location of the dimension line. As you move the cursor, the dimension moves around or inside the circle or arc. AutoCAD LT draws a hook line, also called a landing or dogleg, that is one arrowhead long (as shown in the first two illustrations).
Different types of diameter dimensions
AutoCAD LT measures the diameter and displays the text with a diameter symbol in front of it. The next prompt is
Dimension line location (Mtext / Text / Angle): Specify a point or enter an option
If you specify a point, AutoCAD LT uses the point to locate the dimension line. After you specify the location, DIMDIAMETER ends.
Customizes the text. AutoCAD LT measures the coordinate and displays the dimension text as angle brackets (< >) in the Multiline Text Editor dialog box. Enter or delete characters for customized text, or choose OK to accept the default measured length. If you edit the text, you can use Unicode character strings to express special characters. Enclose format strings for prefixes and suffixes in angle brackets (< >). Enclose format strings for alternate units in square brackets ([ ]). AutoCAD LT draws the dimension measurement in place of the < > characters.
The units settings, tolerance settings, and current text style determine how the text is displayed. After you specify the text, AutoCAD redisplays the Dimension Line Location prompt.
Customizes the text. AutoCAD LT measures the distance and displays it as the default value at the command line. Enter or delete characters for customized text, or choose OK to accept the default measured length. To include the default length in your custom text, represent the length as angle brackets (< >).
The units settings, tolerance settings, and current text style determine how the text is displayed. After you specify the text, AutoCAD LT redisplays the Dimension Line Location prompt.
Changes the angle of the dimension text.
Enter text angle: Specify an angle
After you specify the angle, AutoCAD LT redisplays the Dimension Line Location prompt.
You control center marks or lines with the options in the DDIM Geometry dialog box. When a dimension line is drawn inside the arc or circle, AutoCAD LT does not create a center mark or line. AutoCAD LT stores the value in the DIMCEN dimensioning system variable.
Related Commands:
DDIM controls dimension styles and settings such as units
and style. To modify the appearance of dimension and the dimension
text use DDEDIT, DIMEDIT, and DIMTEDIT.
System Variables:
DIMCEN controls the creation of center marks and lines.
DIMFIT controls how text fits within the extension lines.
DIMJUST controls the horizontal justification of dimension
text. DIMTAD controls the vertical justification of dimension
text. DIMTIH and DIMTOH control the position of
dimension text inside and outside the extension lines. DIMTOFL
controls drawing a dimension line between the extension lines
even when the text is placed outside the extension lines. DIMUPT
controls user-positioned text.