Altium Designer Documentation

Angular Dimension Properties

Modified by Susan Riege on Mar 14, 2018
All Contents

Parent page: Angular Dimension

PCB Editor object properties are definable options that specify the visual style, content and behavior of the placed object. The property settings for each type of object are defined in two different ways:

  • Pre-placement settings – most Angular Dimension object properties, or those that can logically be pre-defined, are available as editable default settings on the PCB Editor - Defaults page of the Preferences dialog (accessed from the  button at the top-right of the workspace). Select the object in the Primitive List to reveal its options on the right.
  • Post-placement settings – all Angular Dimension object properties are available for editing in the Properties panel when a placed Angular Dimension is selected in the workspace.

      The Angular Dimension default settings in the Preferences dialog and the Angular Dimension mode of the Properties panel

Style

  • Dimension Line Width - the current dimension line width.
  • Extension Line Width - the current width for the dimension extension lines.
  • Extension Line Gap - the distance between a dimension extension line and the object being dimensioned.
  • Extension Line Offset - the current arrow line offset with respect to the dimension extension line. 
  • Text Gap - the current gap to the left and right of the dimension value text. 

Arrow Style

  • Arrow Size - the current arrowhead size. The size is measured as the distance between the arrow tip and the end of the arrow 'legs'.
  • Arrow Length - the current arrow length. Note that the value entered into this field is applied only when the Arrow Position (in the Properties region) is set to Outside.

Properties

  • Layer - the layer to which the dimension is currently assigned. Dimensions can be assigned to any available layer. Use the drop-down to select a different layer.
  • Text Position - the current position of the dimension text. Use the associated drop-down list to choose one of the following options:
    • Automatic - the dimension text will be placed in the most appropriate location with respect to the dimension so that the text itself is always readable.
    • Aligned - Center - the dimension text will be aligned to the center of the dimension line.
    • Aligned - Top - the dimension text will be aligned above the dimension line and centered.
    • Aligned - Bottom - the dimension text will be aligned below the dimension line and centered.
    • Aligned - Right - the dimension text will be aligned to the right of the dimension line (outside of the extension line).
    • Aligned - Left - the dimension text will be aligned to the left of the dimension line (outside of the extension line).
    • Aligned - Inside Right - the dimension text will be aligned to the right of the dimension line (inside the extension line).
    • Aligned - Inside Left - the dimension text will be aligned to the left of the dimension line (inside the extension line).
    • Unidirectional - the dimension text will be aligned to the center of the dimension line but will remain horizontal regardless of the dimension alignment angle.
    • Manual - the dimension text will be available for manual placement directly in the workspace.
  • Arrow Position - the current position of the dimension arrows. The available options are:
    • Inside - arrows will be positioned inside the dimension's extension lines (pointing outwards).
    • Outside - arrows will be positioned outside the dimension's extension lines (pointing inwards).
  • Text Height - the current height of the dimension text characters. The character width used to display or print the text is automatically proportioned to this height. A minimum height of 36mil (0.9mm) will allow the text to be legibly photo-plotted.

Font Type

  • TrueType -  use this field to choose the required TrueType font. The drop-down list is populated with TrueType and OpenType (a superset of TrueType) fonts found in the \Windows\Fonts folder. Note that the list will include only entries for detected (and uniquely named) root fonts. Use the B (bold) and (Italic) options to add emphasis to the text.
  • Stroke  
    • Font - use this field to choose the required Stroke font. Available options are:
      • Default - a simple vector font that supports pen plotting and vector photo-plotting.
      • Serif - a more complex font that will slow down vector output generation, such as Gerber.
      • Sans Serif- a more complex font that will slow down vector output generation, such as Gerber.
Stroke-based fonts are built into the software and cannot be changed. All three fonts have the full IBM extended ASCII character set that supports English and other European languages.
  • Stroke Width - displays the current stroke width. 

Units 

  • Primary Units - the current unit that is selected for the calculation and display of the dimension value. Choose either Degrees (display the dimension value in Degrees/Minutes/Seconds) or Radians.
  • Value Precision - the current setting for the number of decimal places to the right of the decimal point for which the dimension will be displayed.

Value

  • Format - the current setting for the format of the dimension text. Use the associated drop-down to change the format as required. The options listed will depend on the chosen Unit and present based on the actual value for the current dimension. In generic terms, the available options are:
    • None - no dimension text is displayed.
    • Value Only - no units are displayed, only the dimension value (e.g., 45).
    • Degrees Only - units of degrees are displayed after the dimension value (e.g., 45°).
    • Degrees/Minutes - units of degrees and minutes are displayed after the dimension value (e.g., 45°12').
    • Degrees/Minutes/Seconds - units of degrees/minutes/seconds are displayed after the dimension value (e.g., 45°12'0.61").
When the chosen unit is Radians, the available options are None and Value Only.
  • Sample - this field presents a sample of how the dimension text will appear in accordance with specified Format and any defined Prefix and/or Suffix.
  • Prefix - the current prefix of the dimension value.
  • Suffix - the current suffix of the dimension value. 
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