AutoCAD provides two options for masking the background behind text in a drawing. The old standby is the TextMask Express Tool, available since Release 14. AutoCAD 2005 introduced the Background Mask command as a shortcut menu item in Mtext. Note that Background Mask works only on mtext while TextMask works on dtext, and mtext. It also applies to the entire mtext object. You can’t single out a word or phrase to mask.
While in the Mtext Editor, right-click and select Background Mask.
Caption: Right-click in the Mtext Editor and select Background Mask.
In the dialog box that appears, check the box next to Use background mask. Select a fill color. There’s an option to use the drawing background color; when checked, this makes the rectangle behind the text the same color as your drawing screen. You can also set a border offset factor.
Caption: Background Mask options.
Select OK, then click anywhere outside the Mtext Editor to see the results. You may want to change the text justification for best results.
Caption: Background mask example.
Start Text Mask from the Text submenu in the Express Tools menu (you may need to load the Express Tools first).
Caption: Text Mask appears in the Express Tools menu. Note the companion tool Unmask Text, which is used to remove text masks.
The first prompt shows the current settings. Type M if you want to specify the type of masking object: wipeout, solid, or 3D face. The default is wipeout, which gives you a mask that is the same color as the drawing screen. Select solid if you want a colored mask. Then select your desired color.
You can also set an offset for the text mask, if you desire. The next step is to select the text objects. The text mask object will be grouped with the text you select. Note that you should make sure your PICKSTYLE system variable is set to 3 so that you can move or copy the mask object with the text. Note also that you can use the Draworder command to produce the desired masking effect.