DesignSpark Mechanical allows you to do precise, dimensional sketching internal to the current line and relative to other lines and points. If a dimension cannot be edited, it does not highlight on mouseover.
To dimension the current line
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Press the spacebar to enter a value.
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Press Tab to highlight and edit a secondary dimension.
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Press Enter to accept the values.
DesignSpark Mechanical allows you to enter mathematical expressions as dimension values.
To dimension relative to other lines and points
Hover the mouse over a line or point and press Shift to create a dimension relative to that line or point. If you click a spline, the dimension is always created from the start point of that spline.
The dimension is displayed as Cartesian or Polar coordinates based on which coordinate system you select in the Options panel.
To create an offset angular dimension
If the angular reference does not touch the arc center, parallel reference lines are created.