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When creating dimensions it's very important to use object snaps. However, sometimes we get so preoccupied with object snaps that we don't realize that we can also create dimensions by simply selecting an object. In this lesson we're going to learn how to create one-click dimensions. On my screen I have a drawing that represents a small coffee table and I would like to apply some dimensions to this geometry. Let me mention that I have already created a dimension style and I have created a layer for my dimensions and I have set that layer current. I'm going to start by clicking the Linear Dimension tool and here is what we typically grab our object snaps, but look at what AutoCAD is asking. It says, Specify first extension line origin or select object is in the brackets.
That means it's the default option. So if I press Enter I can simply select an object and AutoCAD will apply a dimension. Now, I'd like to create another dimension. So I'm going to press my Spacebar to re-launch the command and in AutoCAD the Spacebar and the Enter key are treated the same. So I'll press the Spacebar again to access the Select object option. I will then select this object and I'll pull the dimension out to here. Let's create another. I'll press Spacebar, Spacebar, I'll select this object, and I'll pull this dimension out to the endpoint of this arrowhead.
So as fast as you can double-tap the Spacebar, you can apply dimensions to your drawing in a single click. Let's add another one over here. I'll place another one over here. Now double-tap the Spacebar and I'll place a dimension here, one more here, and I'll pull one out over here. Now the Select objects dimensioning method isn't going to be used for all of your dimensions, but if you keep this option in mind you'll find that you can probably create several of your dimensions using just a couple clicks.
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