command first and then select the objects.
Example:
1. Start the Erase command using one of the following:
Ribbon = Home Tab / Modify Panel / or Keyboard = E <Enter>
2. Select objects: Pick one or more objects.
Select objects: Press <Enter> and the objects selected will disappear.
Method 2.
Select the objects first and then the <Delete> key.
Example:
1. Select the object to be erased.
2. Press the <Delete> key.
Method 3.
Select the objects first and then select the Erase command from the Shortcut Menu.
Example:
1.Select the object to be erased.
2.Press the right mouse button.
3.Select Erase from the Shortcut Menu using the left mouse button.
Note: Very Important
If you want the erased objects to return, select the Undo tool
More about Undo and Redo later.
The Explode command changes (explodes) an object into its primitive objects. For example, a rectangle is originally one object. If you explode it, it changes into 4 lines. Visually you will not be able to see the change unless you select one of the lines.
1. Select the Explode command by using one of the following:
Ribbon = Home Tab / Modify Panel / or Keyboard = X <Enter>
2. The following will appear on the Command Line:
Command: _EXPLODE
Select objects: select the object(s) you want to explode.
Select objects: select <Enter>.
(Notice there is no visible difference. But now you have 4 lines instead of 1 rectangle).
Try this: Draw a rectangle and then click on it. The entire object highlights. Now explode the rectangle, then click on it again. Only the line you clicked on should be highlighted. Each line that forms the rectangular shape is now an individual object.
The Extend command is used to extend an object to a boundary. The object to be extended must actually or theoretically intersect the boundary.
1. Select the Extend command using one of the following:
Ribbon = Home Tab / Modify Panel / or Keyboard = EX <Enter>
2. The following will appear on the Command Line:
Command: _EXTEND
Current settings: Projection = UCS Edge = Extend
Select boundary edges …
Select objects or <select all>: select boundary (P1) by clicking on the object.
Select objects: stop selecting boundaries by selecting <Enter>.
Select object to extend or shift-select to Trim or
[Fence/Crossing/Project/Edge/Undo]: select the object that you want to extend (P2 and P3). (Select the end of the object that you want to extend.)
Select object to extend or [Fence/Crossing/Project/Edge/Undo]: stop selecting objects by pressing <Enter>.
Note: When selecting the object to be extended (P2 and P3 above) click on the end pointing towards the boundary.
Fence: Use a “Fence” line to select objects to extend
Crossing: You may select objects using a crossing window
Project: Same as Edge except used only in “3D”.
Edge: (Extend or No Extend)
In the “Extend” mode, (default mode) the boundary and the objects to be extended need only intersect if the objects were infinite in length.
In the “No Extend” mode the boundary and the objects to be extended must visibly intersect.
Undo: You may “undo” the last extended object while in the Extend command.
The Fillet command will create a radius between two objects. The objects do not have to be touching. If two parallel lines are selected, it will construct a full radius.
Radius a corner
1. Select the Fillet command using one of the following:
Ribbon = Home Tab / Modify Panel / or Keyboard = F <Enter>
2. The following will appear on the Command Line:
3. Set the radius of the fillet
Command: _FILLET
Current settings: Mode = TRIM, Radius = 0.000
Select first object or [Undo/Polyline/Radius/Trim/Multiple]: type “R” <Enter>.
Specify fillet radius <0.000>: type the radius <Enter>.
4. Now fillet the objects
Select first object or [Undo/Polyline/Radius/Trim/Multiple]: select the 1st object to be filleted.
Select second object or shift-select to apply corner or [Radius]: select the 2nd object to be filleted.
Note: When you place the Cursor on the second object, AutoCAD displays the fillet and allows you to change the radius before it is actually drawn. If you choose to change the radius, select the Radius option, enter a new radius value then select the 2nd object.
The Fillet command may also be used to create a square corner.
Square