Nearly all graphics programs today have tacitly acknowledged the Noun/Verb method for selecting objects. This method requires you to select objects before you issue a command to edit them. The next set of exercises shows you how to use the Noun/Verb method in AutoCAD.
You have seen that when AutoCAD is waiting for a command, it displays the cross hair cursor with the small square. This square is actually a pick box superimposed on the cursor. It tells you that you can select objects, even while the command prompt appears at the bottom of the screen and no command is currently active. The square momentarily disappears when you are in a command that asks you to select points. From now on, this cross hair cursor with the small box will be referred to as the Standard cursor.
Now try moving objects by first selecting them and then using the Move command.
1. First, press the Esc key twice to make sure AutoCAD isn’t in the middle of a command you may have accidentally issued. Then click the arc. The arc is highlighted, and you may also see squares appear at its endpoints and its midpoint. These squares are called grips. You may know them as work points from other graphics programs. You’ll get a chance to work with them a bit later.
2. Choose Move from the Modify toolbar, The cursor changes to Point Selection mode. Notice that the grips on the arc disappear, but the arc is still selected.
3. At the Base point: prompt, pick any point on the screen. The prompt To point: appears.
4. [email protected]<O.J. Metric users should type @3<O.J.The arc moves to a new location 1 unit (3 units for metric users) to the right.
In this exercise, you picked the arc before issuing the Move command. Then, when you clicked the Move tool, you didn’t see the select object: prompt. Instead, AutoCAD assumed you wanted to move the arc that you had selected and went directly to the Base point: prompt.
Next you will move the rest of the door in the same direction using the Auto select feature.
1. Pick a point just above and to the or the rectangle representing the door. Be sure not to pick the door it-elf . Now a window appears that you can drag across the screen as you move the cursor. If you move the cursor to the left of the last point selected, the window appears dotted.
2. Now pick a point below and to the right of the door, so that the door is completely enclosed by the window, as shown in the bottom image. The door is highlighted (and again, you may see-small squares appear at the line’s endpoints and midpoints).
3. Click the Move tool again. Just as in the last exercise, the Base point : prompt appears.
4. Pick any point on the screen; then [email protected]<O-l. Metric users should enter @3<O-l.The door joins with the arc.
The two different windows you have just seen-the solid one and the dotted one–represent a standard window and a crossing window. If you use a standard window, anything that is completely contained within the window is selected. If you use a crossing window, anything that crosses through the window is selected. These two types of windows start automatically when you click any blank portion of the drawing area with a Standard cursor or Point Selection cursor; hence the name Auto select.
Next, you will select objects with an automatic crossing window.
1. Pick a point below and to the right of the door. As you move the cursor to the left, the crossing (dotted) window appears.
2. Select the next point so that the window encloses the door and part of the arc. The entire door, including the arc, is highlighted.
3. Click the Move tool.
4. Pick any point on the screen; then enter @1<180-l.Metric users should type @3<180-l.The door moves back to its original location.
You’ll find that in most cases, the Auto select standard and crossing windows are all you need when selecting objects. They really save you time, so you’ll want to get familiar with these features.
Before continuing, you need to use File > Save to save the Door file.You won’t want to save the changes you make in the next section, so saving now stores the current condition of the file on your hard disk for safekeeping.
Restrictions on Noun/Verb Object Selection
If you prefer to work with the Noun/Verb selection feature, you should know that its use is limited to the following subset of AutoCAD commands, listed here in no particular order:
For all other modifying or construction-oriented commands, the Noun/Verb selection method is inappropriate because for those commands you must select more than one set of objects. But you do not need to remember this list. You’ll know if a command accepts the Noun/Verb selection method right away. Commands that don’t accept the Noun/Verb selection method clear the selection and then display.a Select object: prompt.