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AutoCAD is all about putting our designs on paper. So it's time we start creating some line work. In this lesson we are going to look at AutoCAD's most basic tool, the Line command. On my screen I have got this large rectangle, this shape is going to serve as a boundary. Think of it as a sandbox that we will use to explore the features of the Line command. To create a line, I will move up to the Draw panel and I will click the Line icon. If we look at the command line, we can see AutoCAD is asking us to specify first point, so I will pick a point on screen and then I will pick a few more points and as I move my cursor for each segment, take a look at how the line moves.
This is called the Rubber Band Effect. Before I specify another point let's look at the command line again. Notice I can specify my next point or I have the sub-options. Now typically I like to access sub- options by right-clicking and selecting them from this pop-up menu. I would like to back up a segment, so I am going to select Undo from the menu and let's backup one more segment, I will right click and I will select Undo again. I will then click a few more points on screen and when I am finished I will right click and select Close to close my shape.
Let's launch the Line command again. I will start my first point. I will pick a few more points and may be my line segment is now finished. Let's talk about how we can exit the Line command. One way is by hitting the Escape key that will cancel us out of any running command. I am going to launch Line again. I will create another segment down here. Another way to exit a command is by right- clicking and selecting Enter from the menu. Most every AutoCAD command works this way. Now this geometry is nice but it has no geometric value. Let's create some line work that's based on real dimensions.
I am going to launch the line command and then I will pick a point on screen and I am going to pull-off to the right here and I will type 5 and hit Enter. I just created a line segment that's five units long in the direction that I was pulling. I am going to pull down and I will type 9 and hit Enter. I will then pull over here to the left and type 7 and hit Enter and then when I am finished, I will right click and select Close to close my shape. This method of drawing is called Direct Distance Entry and while we are still scribbling on screen, this geometry is based on Real Dimensions.
Now that we have a functional understanding of how to use the Line command we are ready to move to our next lesson where we will create some geometrically accurate line work.
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