S - Commands   
STYLE (command)
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It manages text styles 

 Format toolbar, text and dimensions 

  Menu : Format Text Styles

 Command line:  STYLE

It manages global and current text styles:

 

As for Linetypes, Hatching styles and Dimension styles , the Text style management is divided in:

Using this dialog box it is possible to add, modify, duplicate and erase text styles.

When a text line is inserted in the drawing, a copy of the current text style is created in the text line just inserted (local to that line).
In this way will then be possible: