Join Shaun Bryant for an in-depth discussion in this video Trimming and extending, part of Cert Prep: AutoCAD Certified Professional (2015).
- We're now going to look at the TRIM and EXTEND commands available to you in AutoCAD and the sorts of things that you might be expected to do for your AutoCAD Professional Certification Exam. Now we're going to work with these rectangles here, going across our little plate that we're creating. And what we're going to do, we're going to convert each of these rectangles in essence into three buttons. And they're going to be the Control buttons on this little Control Panel Plate that we're creating. Now you will notice that there's the circles here that we created in the previous video.
Just select them, you'll see they're a group, and then I'm going to go to the Home tab on the ribbon and hit Erase there to delete them. And the same with the arc, going to erase that, as well. Now zoom in nice and close on your rectangles here. You want to be able to see them, but more importantly you want to be able to get that crosshair in between each rectangle. You'll see why in a moment when we start using the TRIM and EXTEND commands. Now you'll notice I'm staying in the Modifying Objects_COMPLETE drawing. You want to be following along with your Modifying Objects.dwg file that you've been saving as you've been working through the videos.
Go to the Home tab on the ribbon. Go to the Layers panel here, and make sure in your Layer pull down menu that you're using the RECTANGLE layer. The red one there. And what we're going to do, we're just going to draw two random, horizontal lines across our group of rectangles. So go to the Line command in the Home tab there on the Draw panel, and just place a point here. Use your Polar Tracking to keep it horizontal. So make sure your Polar Tracking is on. And we're going to drag that across like that to there, like so.
And click there like that. And then I'm just going to press Enter to finish the Line command. Now what we're going to do is we're going to utilize the Mirror command to mirror that line about a midpoint of one of these rectangles here. So select the line itself that you've just drawn, go up to the Modify panel and select the Mirror command. It's not on the shortcut menu, so you do have to go down this route. Click on MIRROR. First point of your mirror line will be there, midpoint. Go all the way across to this midpoint here and click, and it will prompt you then Erase source objects? Say No to that and click on it, and there's our two lines like so.
Now you can see that we've got lines going across the gaps between the rectangles and we've also got lines going outside the rectangles, as well. Now what we need to do is define our cutting edges to allow us to trim and also extend. Now what I'm going to do here is I'm going to show you a really neat trick. Using TRIM and EXTEND in AutoCAD. So I'm going to go up to the Modify panel. Again, TRIM and EXTEND are not on the shortcut menu. So if I click on this flyout menu here, TRIM, TRIM and EXTEND look very similar, so make sure that you select TRIM, like so.
And then what I want you to do is select the objects that you're going to use as your cutting edges. So we're going to select this particular rectangle here, this particular rectangle here, and this particular rectangle here. And then press Enter to confirm your cutting edges. Then you'll be prompted to Select object to trim or shift-select to extend. Now remember, when you're trimming and extending, if you hold down Shift when you're trimming, you can extend. When you're extending, if you hold down Shift, you can trim.
Now what we're going to do is we're going to trim here. Click on the bit that you don't want. So I'm just going to trim those there, like that. But then I'm going to trim here, and here, and here, and here, and then work my way across. If I click there, can you see that it's trimming to this edge here? Now what happens if I want to extend a line? Well what I can do now is hold down Shift and click on the end of this line here and it will extend. It's extending to the cutting edge.
If I release shift again, I can now trim here, and here, like so. I then press enter to finish the TRIM command. Now I've done the three buttons in the middle. I now need to make these outer rectangles into buttons, as well and I'm going to use EXTEND this time. So now what I'm going to do is go back up to the Modify panel, Click on the flyout and select EXTEND from the little menu there. Now, the objects that I'm going to extend to are going to be this rectangle here, and this rectangle here, and then press Enter to confirm that selection.
Now, select the object to extend. It's going to be this line here and it extends out to there. Now if I click there, and then click again, I can extend out to there. But if I now hold down Shift, I can trim that line there, like so but it trims back this line, as well. Because that isn't an actual extension boundary. So I've kind of messed up a little bit. Doesn't matter, I can right-click, I can Undo that last trim, like so, and then right-click again and Undo another step, and I'm back to where I was before.
Now the thing is, I can extend that through, quite happily. And that's what I'm going to do. I'm going to extend there and then extend there, and then I'm going to extend on the other side in the same way, like so. So I'll just extend quickly across, like that. And then press Enter to finish. Now there's one more trim method that I haven't shown you yet. It's called a dirty trim. Where everything that intersects becomes a cutting edge. So I go back up to the Modify panel, click on the flyout and I click on TRIM.
Instead of selecting any cutting edges, can you see there's a <select all> there in the Dynamic Input prompt? If I just press Enter, that means I've selected everything as a cutting edge. So now, I can just hover here, I can trim there, trim there, trim there, and trim there. Make sure that I press Enter to finish, job done. All of my rectangles now have been converted to the Control buttons on the Panel Plate that I'm creating. And that's how you utilize TRIM and EXTEND in AutoCAD and use that shift-select between the TRIM and EXTEND commands.
Again, practice, practice, practice for your AutoCAD Professional Certification Exam.
- Creating and publishing AutoCAD files
- Drawing shapes and lines
- Creating isometric drawings
- Transforming objects
- Creating and using arrays
- Organizing objects and layers
- Reusing content with blocks
- Adding text, dimensions, multileaders, and scales
- Creating layouts
- Setting printing and plotting options
Skill Level Appropriate for all
Q: Is this certification available for AutoCAD for Mac users?
A: AutoCAD certification is on the Windows environment only. Currently Autodesk does not have plans for an AutoCAD for Mac certification.
Q: This course was updated on 02/01/2016. What changed?
A: We added four new videos to the "Certification: What Is It?" chapter. These tutorials cover Certiport, the online certification service that now offers a variety of Autodesk certifications.