Because drawings are usually in flux even after actual construction or manufacturing begins, you will eventually have to edit previously entered attributes. In the example of the apartment building, many things can change before the final set of drawings is completed.
Attributes can be edited individually (one at a time) or they can be edited globally (meaning you can edit several occurrences of a particular attribute tag all at one time). In this section you will make changes to the attributes you have entered so far, using both individual and globed editing techniques, and you will practice editing invisible attributes.
Editing Attributes One at a Time
AutoCAD offers an easy way to edit attributes one at a .time through a dialog box . The following exercise demonstrates this feature.
1. Use the View >Named View option to restore the First view.
2. Choose Modify >Attribute >Single, or enter Ate.J at the command
3. At the Select block: prompt, click the apartment number attribute in the unit just to the right of the first unit in the lower-left comer. A dialog box appears, showing you the value for the attribute in an input box. Note that the value is already highlighted and ready to be edited.
4. Type 112 and then click OK to make the change.
5. Do this for each room number, using Figure IDA to assign roam numbers.
Editing Several Attributes in Succession
You can take advantage of the Tab key and the space bar to quickly edit a series of attributes. In a dialog box, the Tab key moves you to the next option. In AutoCAD, the space bar reissues the previous command. By combining these two tools, you can make quick work of editing attributes. The following steps describe the process.
1. Choose Modify >Attribute >Single, or enter Ate.J at the command
prompt to start the attribute-editing process.
2. Select the first attribute you want to edit.
3. In the Edit Attributes dialog box, enter the new value for the attribute. The old attribute value should already be highlighted. For blocks with multiple attributes, you may need to press the Tab key until you get to the value you want to edit.
4. After entering the attribute value, press the Tab Key to advance to the OK button.
5. Press the space bar twice=once to accept the OK button, and again to reissue the Edit Attributes command.
6. Click the next attribute you want to edit and repeat the process.
If you are comfortable with the keyboard, you can get into a rhythm of selecting and editing attributes using these steps, especially if the block contains only one attribute.
Making Minor Changes to an Attribute’s Appearance
Eventually, there will be situations where you will want to make a change to an attribute that doesn’t involve its value, such as moving the attribute’s location relative to the block it is associated with, or changing its color, its angle, or even its text style. To make these types of changes, you must use the Att. edit command. Here’s how to do it.
1. Choose Modify :> Attribute >Global, or type Att edit ↵ at the command prompt.
2. At the Edit Attributes One at a Ti me? [Yes/No] <Y>: prompt, press ↵ to accept the default, Y.
3. At the Enter block Name Specification <*>: prompt, press ,r, Optionally, you can enter a block name to narrow the selection to specific blocks.
4. At the Enter attribute Tag Specification <*>: prompt, press ,i. Optionally, you can enter an attribute tag name to narrow your selection to specific tags.
5. At the Enter attribute Value Specification <*>: prompt, press u, Optionally, you can narrow your selection lo attributes’ containing specific values.
6. At the Select Attributes : prompt, ‘you can pick the set of blocks that contain the attributes you wish to edit. Once you press↵ to confirm your selection, one of the selected attributes becomes highlighted, and an “x” appears at its base point.
7. At the prompt
enter the option that best describes the attribute characteristic you wish to change. After you make the change, the prompt returns, allowing you to make another change to the attribute. If you press↵ to accept the default, N, another attribute highlights with an x at its base.
8. The prompt
appears again, allowing you to make changes to the next attribute.
9. This process repeats until all the attributes have been edited or until you press the Esc key.
Making Global Changes to Attributes
There will be times when you’ll want to change the value of several attributes in a file to be the same value. You can use the Edit Attribute Globally option to make any global changes to attribute values.
Suppose you decide you want to change all the entry doors to a type designated as B, rather than A. Perhaps door type A was an input error, or type D happens to be better suited for an entry door. The following exercise demonstrates how this is done.
1: Use the View Control dialog box (View> Named View) to restore the view named Fourth. Pan your view down so you can see the door reference symbol for all the rooms in this view of the drawing.
2. Choose Modify> Attribute> Global, or type Att edit.1 at the command prompt.
3. At the Edit Attributes One at a Time? [Yes/No]<Y>: prompt, enter N1 for N9. You will see the message Global edit of attribute values. This tells you that you are in the Global Edit mode.
4. At the Edit Only Attributes Visible On Screen? [Yes/No] <Y>: prompt, press .1.As you can see from this prompt, you have the option to edit all attributes, including those out of the view area. You’ll get a chance to work with this option later in the chapter.
5. At the Enter block Name Specification <*>: prompt, press .1. Optionally, you can enter a block name to narrow the selection to specific blocks.
6. At the Enter attribute Tag Specification’ <’11:>: prompt, press ;i, Optionally, y u can enter an attribute tag name to narrow your selection to specific tags. .
7. At the Enter attribute Value Specification <*>:’ prompt, press.1. Optionally, you can narrow your selection to attributes containing specific values.
8. At the Select Attributes: prompt, select the door type symbol for units 103 to 115.
9. At the Enter string to Change: prompt, enter A↵.
10. At the Enter new String: prompt, enter B↵. The door type symbols all change to the new value.
In step 8 above, you are asked to select the attributes to be edited. AutoCAD limits the changes to those attributes you select. If you know you need to change every single attribute in your drawing, you can do so by answering the series of prompts in a slightly different way, as in the following exercise.
1. Try the same procedure again, but this time enter N at the Edit Only Attributes Visible On Screen: prompt (step 4 in the previous exercise). The message Drawing must be regenerated afterwards appears. The display flips to Text mode.
2. Once again, you are prompted for the block name, the tag, and the value (steps 5, 6, and 7 in the previous exercise). Respond to these prompts as you did before. Once you have done that, you get the message 16 attributes selected. This tells you the number of attributes that fit the specifications you just entered.
3. At the Enter String to Change: prompt, enter A.J to indicate you want to change the rest of the A attribute values.
4. At the Enter new String: prompt, enter B↵.A series of Bs appear, indicating the number of strings that were replaced.
You may have noticed-in the last exercise that these sect Attribute: prompt is skipped and you go directly to the String to Change: prompt. AutoCAD assumes that you want it to edit every attribute in the drawing, so it doesn’t bother asking , you to select specific attributes.
Making Invisible Attributes Visible
Invisible attributes, such as those in the door reference symbol, can be edited globally using the tools just described. You may, however, want to be a bit more selective about which invisible attribute you want to modify. Or you may simply want to make them temporarily visible for other editing purposes. This section describes how you can make invisible attributes visible.
1. Enter Attdisp↵.
2. At the Enter attribute visibility\,setting [Normal /ON/OFF] <ON>:
prompt, enter ON↵. Your drawing will look like. If Regen auto is turned off, you may have to issue the Regen command..At this point, you could edit the invisible attributes. Attribute as in the first attribute, editing exercise. For now, set the attribute Display back to normal.
3. Enter Attdisp↵ again; then at’ the Enter Attribute visibility setting [Normal /ON/OFF] ‘<ON>: prompt, enter N↵ for normal.
Because the attributes were not intended to be visible, they appear to overlap each other and cover other parts of the drawing when they are made visible. Just remember to turn them back off when you are done reviewing them.