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Dimension Types in Sketches Solidworks

When you selected the Smart Dimension tool in the shortcut bar while creating the sketch, you may have noticed that there were a few more dimension types Cr e a t e a B a s e E x t r u s io n 9 5 available. The Smart Sketch dimension type will be the type you will use most of the time, but it still wouldn’t hurt to become familiar with all the dimension types: 
Smart Dimension. The Smart Dimension tool will be your most used tool when defining sketch elements. Smart Dimension automatically selects the dimension type that will be used based on the sketch entities that are selected. Not only does Smart Dimension determine the dimension type based on the type of entity selected, but it also can choose another dimension type, such as angles and point-to-point dimensions, based on where you place the dimensions. 
Horizontal Dimension. The Horizontal Dimension tool creates a dimension where the dimension line is horizontal and the extension lines are vertical regardless of the entity selected in the sketch. 
Vertical Dimension. The Vertical Dimension tool creates a dimension where the dimension line is vertical and the extension lines are horizontal regardless of the entity selected in the sketch. 
Ordinate Dimension In ASME Y14.5, ordinate dimensions are referred to as rectangular coordinate dimensions without dimensions lines—that’s quite a mouthful. Luckily, in SolidWorks they are only referred to as ordinate dimensions, and you create them with the Ordinate Dimension tool. This type of dimension is shown with the dimension’s value on the extension line without the addition of dimension lines or arrows. In a sketch, a zero dimension is specified, and then each subsequent dimension is shown with the value of the distance from the zero dimension. Like in smart dimensions, the Ordinate Dimension tool automatically determines the orientation of the dimension based on the entities selected. 
Horizontal Ordinate Dimension The Horizontal Ordinate Dimension tool creates a dimension with the value above the extension line without a dimension line or arrows. It will only place ordinate dimensions that are horizontally related to the selected dimension origin. 
Vertical Ordinate Dimension The Vertical Ordinate Dimension tool creates a dimension with the value next to the extension line without a dimension line or arrows. It will only place ordinate dimensions that are vertically related to the selected dimension origin.

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