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Control Dimension Text

May 20, 2011

     You can control the settings affecting the appearance of dimension text. Any changes you make affect the current dimension style. The preview frame on the upper right corner of the Modify Dimension Style dialog box shows the appearance of the dimensions based on the current dimension style settings.


Fit Dimension Text Within Extension Lines

      When there is not enough space between extension lines to accept both of dimension text and arrowheads, you have to adjust one or both of their placement. By default, the system fits them best depending on the available space. You can also specify other method to place them on the Fit tab of the Modify Dimension Style dialog box. If there is not room for placing text and arrowheads, however, you want to keep them together, and then they are both placed outside. If there is room for only text or arrowheads, you can specify either text only or arrowheads only to be placed between the extension lines.

    You can also choose the "Place text manually when dimensioning" option to place dimension text manually.

     The following illustrations show how system applies a "best fit" for arrowheads and text.

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     If there is no space for text between the extension lines, the system creates a leader automatically to place text. You can set the relationship between them on the Text tab of the Modify Dimension Style dialog box.

     If you choose the "Always draw dim line between ext lines" option on the Fit tab of the Modify Dimension Style dialog box, system creates a line between the extension lines as dimension line even if neither the arrow heads nor the text are outside of the extension lines. Shown as follows

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To format dimensions

  1. Choose Dimension > Dimension Style.

  2. In the Dimension Style Manager, select the style you wish to change and choose Modify.

  3. Click Fit tab.

  4. Under Fit options and Text Placement, select an option.

  5. Click OK.

  6. Choose Close to exit.

Dimension toolbar\

Command line DIMSTYLE

NOTE You can also specify how dimension text and arrows are arranged using the DIMATFIT system variable. You can specify how dimension text is moved using the DIMTMOVE system variable.


Fit Diameter Dimension Text

       You can create various diameter dimensions based on text placement, fit options and the selection of "Always draw dim lines between ext lines" option on the Fit tab. Shown as follows:

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       Control the Location of Dimension Text ZWCAD provides three justification settings: horizontal, aligned with dimension line, and ISO standard. You can also specify other location for the text. Most of settings are interdependent.

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Align Dimension Text

        Whether the text is inside or outside the extension line, it has no effect on the justification of dimension text. You can choose whether the text is align with the dimension lines or remains horizontal. The following figures show the combination of these two options. The default justification is horizontal.

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To align dimension text with the dimension line

  1. Choose Dimension > Dimension Style.

  2. In the Dimension Style Manager, select the style you wish to change and choose Modify.

  3. Click the Text tab.

  4. Make your selections.

  5. Click OK.

  6. Choose Close to exit.

Dimension toolbar \

Command line DIMSTYLE


Control the Location of Dimension Text

       You can place dimension text vertically or horizontally, and give the offset the text from the first extension line.


Position Dimension Text Vertically

       The vertical text placement is the position of the text relative to the dimension. You can place text above, below, or centered within the dimension line, or use the JIS dimensions.

      Above places dimension text above the dimension line; Outside places dimension text on the side far from the point you specify for the dimension line; Centered places dimension text medially within the dimension line; JIS places dimension text according to the Japan industry standard.

      In the ANSI standards, centered dimension text splits the dimension line. In the ISO standards, centered text places above or outside the dimension line. In the following illustrations, ISO standards allow angular dimension text to display in any of the ways shown.

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      The justification and other settings may affect the vertical alignment of text. If you select Horizontal Alignment, text inside the extension lines and centered within the dimension is placed horizontally, as shown in the leftmost figure above.

 

Position Dimension Text Horizontally

       The position of text along the horizon is relation to the extension lines. The settings include Centered, At Ext Line 1, At Ext Line 2, Over Ext Line1, and Over Ext Line2. The following illustrations show the examples of Center and Over Ext Line 1applying to dimension text.

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        As you create dimensions, the order you specified the extension line origins determines which extension line is first. For angular dimensions, the order is defined around the counterclockwise. In the following figures, the first extension line origin is 1 and the second one is 2.

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      If the "place text manually when dimensioning" option on the Fit tab of the Modify Dimension Style dialog box is chosen, as you create dimensions, you can place the dimension anywhere inside or outside the extension lines along the dimension line. This option is useful when the space between the extension lines is limited.


Control the Appearance of Dimension Text

       Dimension text could be comprised of user-supplied text, prefixes and suffixes provided by the dimension style, and generated measurements. For example, you can add a radium symbol as a prefix to a measurement, or add an abbreviation for a unit beyond the text, such as cm.

    You can also set the text style and formats of color, height for the dimension text.


Control the Text Style in Dimensions

       You can set the text style for dimension text on the Text tab of the Modify Dimension Style dialog box. You can also specify a dimension text color and a height irrelevant to the height value set by current text style. Choose the "draw frame around text" creates a frame when you create dimension text.

     The text styles applied to dimensions are the same as the one applied to all text created in your drawing.


Supply User Text to Dimensions

       Besides of the prefixes and suffixes specified for primary and alternate units, you can provide your own text. Because the prefix, suffix, and user-supplied text can be treated as a single text string, they can be used to represent tolerance stacks and the changes can be applied to font, text size, and other characteristics using the text editor.

     The separator symbol \X is used to separate user text above and below the dimension line.

      Text prior to this symbol is aligned with and below the dimension line. Text following this symbol is aligned with and below the dimension line.

      For example, if you select Text while creating dimensions, and then input user text "<> ZWCAD \X WELCOME", thus the user text is separated above and below the dimension line. In which, <> stands for main units, \X separates the text by a dimension line.


Commands Reference

DIMSTYLE: Creates and modifies dimension styles

DIMTEDIT: Moves and rotates dimension text

System Variables Reference

DIMCLRT: Assigns colors to dimension text

DIMFRAC: Sets the fraction format when DIMLUNIT is set to 4 (Architectural) or 5 (Fractional)

DIMGAP: Sets the distance around the dimension text when the dimension line breaks to accommodate dimension text

DIMTFAC: Specifies a scale factor for the text height of fractions and tolerance values relative to the dimension text height, as set by DIMTXT

DIMTXSTY: Specifies the text style of the dimension

DIMTXT: Specifies the height of dimension text, unless the current text style has a fixed height

DIMJUST: Controls the horizontal positioning of dimension text

DIMTAD: Controls the vertical position of text in relation to the dimension line

DIMTIH: Controls the position of dimension text inside the extension lines for all dimension types except ordinate

DIMTOH: Controls the position of dimension text outside the extension lines

DIMTVP: Controls the vertical position of dimension text above or below the dimension line

DIMUPT: Controls options for user-positioned text

DIMATFIT: Determines how dimension text and arrows are arranged when space is not sufficient to place both within the extension lines

DIMLWD: Assigns lineweight to dimension lines

DIMTIX: Draws text between extension lines

DIMTOFL: Controls whether a dimension line is drawn between the extension lines even when the text is placed outside

  

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