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<p>To help you drawing parallel dimensions, the angle of dimensions is by default a multiple of 15°. You
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the <a href="editingPreferences.html">preferences</a> pane or while drawing, by holding down the <i>Alt</i> key under Windows, the <i>cmd</i> key under Mac OS X or the <i>Shift</i> +<i> Alt</i> keys under Linux.</p>