The Text Styles button allows to manage text styles which are used for the current file.
The Text Styles 
button is in the Editor tab under the section Text. It calls a dialog box for managing text styles which are used for the current CAD file:
Current Text Style
Contains the name of the current text style.
Style Name
Contains a list of text styles of the current CAD file. The current style is highlighted. Right mouse click over the list calls popup menu:
which allows selecting the text style (Set Current), renaming and deleting styles. Please note that the current style can not be deleted.
All Styles
Managing the Style name list. Select All styles to view all the text styles available in the file. Select Styles in use to view only the used text styles.
Text Font
Defines the font name and its style (if available).
Text Measurements
Defines the following text parameters:
| • | Text Height - vertical text size |
| • | Width Factor - OX axis compression coefficient |
| • | Oblique Angle - OY axis deviation angle |
Text Generation
Defines the text direction:
| • | Print text backwards |
| • | Print text upside down |
Apply
Sets text style selected in the Style name as current.
New ...
Creates new text style. After you've pressed the button you will see the following window appear:
Here you'll be able to enter the name of your new style.
The new style gets the properties of the current one by default, but you can change them the way you like. For that after you've created the style select it in the 'Style Name' list and alter the properties the way you need. Press Apply.
Delete
Deletes selected text style. The current style or the style in use can not be deleted.