Create and Modify Objects — AutoCAD 2012


Uploaded by Autodesk on 07.03.2011

Transcript:
Let’s take a look at some basic commands you might use as you create a drawing.
We’ll begin by looking at Layers. Layers allow you to organize objects in your
drawing. You can group similar objects so you can easily turn them off or on for displaying
or printing; and you can lock layers to prevent unwanted
changes. I’ll open the Layer Properties Manager.
This is where you create and manage your layers. I’m going to add a new layer called Objects
to this drawing. I double-click to make it the Current layer,
so that the objects I draw are added to it automatically.
I’ll start drawing using the LINE command. Typically, when you start a command, you will
be prompted to input a value or specify an option. The input expected is displayed as
a prompt in the Command Line and as a tooltip near the cursor if Dynamic Input turned on.
I’ll turn Dynamic Input off for now. To indicate the first point of my line, I
click in the drawing area. Now I’m prompted for the next point. I drag the cursor and
click again. The LINE command continues to prompt for additional
points until I end the command. To end the command I can press Esc, Enter, or the Spacebar,
or I can right-click and choose Enter from the menu.
To control drawing precision, I can choose from a variety of drafting aids.
For example, the Ortho Mode button constrains me to vertical and horizontal lines as I draw.
I’ll turn ortho mode off again. Object snaps (also known as osnaps) allow
me to easily place new objects in relation to existing objects. I’ll use the Endpoint
object snap to connect a new line to the endpoint of the existing line I’ve drawn.
The AutoSnap marker makes it easy to know which object snap is being used.
As you work on a design, you’ll likely need to modify some objects. Before you can modify
an object, you have to select it. To select an object, position your cursor over the object
and click. Click additional objects to add them to the current selection.
I can remove objects in the current selection by holding the Shift key while I click the
objects. I’ll press Esc to clear the selection completely.
Instead of selecting objects individually, I can select multiple objects at once with
a selection window. I’ll drag the cursor from left to right
to select objects that are completely enclosed in the window.
I’ll drag from right to left to create a Crossing selection which selects all objects
crossed by or enclosed in the window. Now let’s look at some Modify commands.
I can use the ERASE command to remove objects from my drawing.
I select the object I want to remove, and then either click the Erase tool or press
Delete. If I make a mistake, I can choose Undo from
the Quick Access toolbar or from the Command shortcut menu.
Let’s say I want to copy these windows. First, I zoom in.
I can use the Zoom command, or I can position my cursor and rotate the wheel on my mouse
forward. I can PAN the drawing view by pressing the
mouse wheel down and dragging. From the Home tab I’ll select COPY and use
a crossing window to select the objects I want to copy.
I’ll use an Intersect Object Snap to copy the windows from one location to another.
Finally, I’ll double-click the mouse wheel to fit my design in the current window.