The CHTEXT command lets you modify the text content, style and attributes of a single text, or selectively modify the text style and attributes of a group of selected texts, via a GUI dialogue operation manner. It provides two different modes of operations; namely, they are:

  • Single Text Modification -- You can modify everything of the selected text by its text content, style font usage and attributes like the text height, width, oblique feature and font orientation.
  • Multiple Texts Modification -- If multiple texts are selected, you can selectively change their the text styles or text attributes to the same new values, excluding their text contents.

When you enter the CHTEXT command, it will ask you to select the texts to modify first via the General Object Selection operation, with the prompt:

Select Text to modify (+):

After the completion of the text selection, CHTEXT will pop up a dialog window to proceed the text modification operation, however, depending on the number of text entities being selected. If you have just selected on single text entity, you are going to modify the text in the single mode and CHTEXT will pop up the dialogue window as shown below:
chtext_1.gif (10109 bytes)

If you have selected more than one text entities, CHTEXT will pop up the dialogue window as shown below:
chtext_2.gif (13162 bytes)

The following describes the details of these screen items from the above two dialogue windows.

Text Entry and Preview

In single text modification mode, you are allowed to modify the text content by clicking the text entry field. The resulted image of the text using current text style will be displayed in the preview window below the text entry field.

The preview window is useful not only in showing the effect of the current text style used for the text creation, but also in justifying the use of the built-in feature text functions and symbols in the text. See the TEXT commands for a list of these functions and symbols.

Note that if you erase all the text from the text entry field and make it empty, a message string like "Click Here to Enter Text" will appear in the field. However, it will disappear when you click the field to enter new text again.

You may cut all the text from the entry field to the clipboard by pressing <Ctrl/X> key and paste in the text from the clipboard by pressing <Ctrl/V> key. To enter these two control codes to the entry field, you have to press down the Scroll Lock key. An alternative way to enter control codes is to use the ALT-nnn sequence. The <Ctrl/X> can be entered by ALT-24 and <Ctrl/V>, ALT-22.

The [Toler.] Button

In single text modification mode, if the text to modify is a tolerance string or you would like to change it into a string of tolerance expression, you may click the [Toler.] button to modify it in tolerance setting method. CHTEXT will internally invoke the text input handler TOLERSTR, the one called by the TOLERANCE command, to handle the tolerance string input, which will help you constructing the tolerance expression using feature text functions.

The [Sample] Button

In both modes, you may click this button to sample an existing text entity from the drawing to setup the target text style and text attributes. You will be asked to pick up the text by the prompt:

Please select the text to copy style:

Note that in single mode, if the text entry field is empty, the text read from the sample text entity will also be duplicated into the entry field for your further editing.

Text Style Fonts

There are two parameter items in the "Text Style Fonts" group; namely, they are

Standard     This item specifies the main text style name used for the text in ASCII codes.

Extended     This item specifies the extension text style name used for the text in non-ascii codes, such as the two-byte coded Chinese, Japanese and Korean, and multi-byte coded Thai.

There are two combo-boxes for each of the above parameter setups. The shorter one on the left shows the name of the text style, which is the name used in the drawing. And, the longer one on the right shows the type and the name of the font, if the font name is available. Both of them provide the same selection set of the available fonts in the system, though in different view of the fonts. Changing either one of them will update the other.

See DDSTYLE for detail descriptions about these two same parameter items, including the building of the Loadable Font Table. CHTEXT will automatically call

DDSTYLE to build the Loadable Font Table if the font table is missing or you have clicked at the tiny unnamed button on the right-most side of this "Text Style Fonts" group.

Text Attributes

The following text attributes are provided in both modes as the target of modification. Note that the display name of these attribute items from the both dialogue windows have a little difference.

Text Height     This item specifies the size of the text font in height. If this value is negative, the text will be mirrored with respect to the base writing line.

Text Width     This item specifies the width factor of the text font to generate. It is usually 1. If this value is negative, the text will be mirrored to the opposite of the writing direction.

Oblique Angle     This item specifies the oblique angle of the text font to generate, in units of degrees. It is usually 0. Positive value slant the font backward, and negative value slant it forward. However, if the attribute to "Oblique from X-Base" is enabled, positive value will slant the font up-ward, and negative value, downward.

Char Spacing     This item specifies the character space adjustment in text font generation. A positive value specifies absolute space (additional to the original one defined by the font), negative value specifies relative space ratio over the text height. A zero value will disable this adjustment function.

For multiple text modification, the above parameter items are provided in combo-box. This is because they are provided by the DDSTYLE dialogue operation. You may pick such item by its dropdown button to select a value directly from those of common use. For single text modification, these items are provided by pure value entry. You may pick at the value box and enter the value directly.

Note that the item "Row Spacing" from the multiple text modification dialogue window is not effective to the existing text modification.

Besides the above value control attributes, there are also on-off control attributes provided in check boxes:

Rotate Font 90 Deg     This on-off state selection specifies whether to rotate the text font by 90?Counter-ClockWise or not. This attribute is useful in writing Chinese/Japanese/Korean texts or the likes in vertical manner.

Oblique from X-Base     This on-off state selection specifies whether to oblique the font from the its base line or not, if the oblique angle is not zero. If it is off, the text font will be oblique in the usual way. However, if it is on, the font will be oblique from its base line, suitable for text font in vertical writing.

Modification Selection

In multiple text modification, you may specify to update only specific text attributes of these selected text. You may select the text attributes to update by making a check on its corresponding check box from the Modification Selection group.

Other Buttons

You may press the [OK] button to conclude the text modification, press the [Help] button to see the helping text, and press the [Cancel] button to cancel the CHTEXT operation. Pressing <ESC> key also quits CHTEXT.

goback.gif (1545 bytes)