In AutoCAD, Trim is used to cut off excess segments, and Extend is used to extend short lines to the boundary. The two operate similarly and can be used in conjunction with efficiency. 1. Trim command: It is suitable for crossed lines or multi-drawn lines. Enter TR or click the scissors icon, select the boundary edge first, and then click the part that needs to be cut, supporting multiple selection and box selection; 2. Extend command: Used to connect unaligned lines, enter EX or click the extension icon, select the boundary edge first, and then click the short line that needs to be extended, and also supports multiple selection; 3. Use in conjunction: Extend first to lengthen the line and then Trim removes the excess part, or hold Shift to switch between the two to increase the operation speed. Mastering the selection and multiple selection functions of boundary edges is the key.
In AutoCAD, trimming and extending lines is one of the most basic operations in daily drawing. Mastering these two commands can make your drawings cleaner and more accurate in size. Although Trim and Extend have different functions, their operation logic is similar. I will start from the usage scenario and explain clearly how to use it.
1. Trim command: Cut off excess line segments
When to use it?
When you draw too many lines, or two lines cross but don't want to retain the excess, use Trim.
How to operate?
- Enter
TRor click the scissors icon in the "Modify" toolbar; - First, select the line you want to use as the "boundary", that is, the line used to cut other lines, and press Enter to confirm;
- Then click on the part you want to cut, and AutoCAD will automatically identify which section you clicked;
- If you want to choose more, you can keep clicking and press Enter to exit after completing it.
Tips:
- If you want to cut a lot of lines at once, you can choose multiple targets in the box;
- Hold down Shift to temporarily switch to Extend without re-entering the command.
2. Extend command: Extend short-term lines to boundaries
When to use it?
When the two lines should have intersected, but because the drawing error is not connected, you can use Extend to connect them.
How to operate?
- Enter
EXor click the extension icon in the "Modify" toolbar; - Also choose the "boundary edge" first, which means where you want other lines to be extended;
- After entering, click on the short line to extend, and it will automatically extend to the boundary;
- Support multiple selection, or you can also box to select multiple objects that need to be extended.
FAQ:
- The line is too long to extend? That may be that it has exceeded the boundary;
- When multiple lines intersect each other, the wrong boundary selection will lead to the wrong result, so pay attention to the click order.
3. Use together: Trim Extend is more efficient when used in conjunction with it
In actual drawing, these two commands are often used together. For example, if you are drawing a rectangle, the four corners are not aligned, then:
- First use Extend to pull the short edge to the correct position;
- Then use Trim to remove the extra parts;
- This way you can quickly organize a regular graphic.
Another hidden usage is: hold Shift in Trim mode to temporarily switch to Extend, and the other way around, so it is faster to switch back and forth.
Basically all of this is it. The two commands seem simple, but when you are proficient, you will greatly improve your drawing efficiency. The key is to understand the role of "boundary edges" and to flexibly use multiple selection and switching functions. At the beginning, you may be a little busy, and it will be smooth if you practice a few more times.
The above is the detailed content of How to trim and extend lines in AutoCAD?. For more information, please follow other related articles on the PHP Chinese website!
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