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CAD tip CAD tip # 4325:

Question CAD 
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Q - question

How to underline text in a RTEXT entity?

A - answer The RText (remote text) contents can be a Diesel expression or an external file. Control characters are disabled in RText by default. The underline control chars are \L and \l.

To enable processing of control characters (like in MText) also in RText objects, use an undocumented setting - bit 2 in the DXF group 70.

Try e.g. the following code which creates an underlined RText:

(entmake '((0 . "RTEXT")  
(100 . "AcDbEntity")  
(100 . "RText")  
(10 10.0 10.0 0.0)  
(40 . 0.3)  
(70 . 3)  
(7 . "Standard")  
(1 . "UNDERLINED {\\LTEXT}") ) )  
Make sure you have used the RTEXT command at least once in the current session.
100% *  CAD 
4.4.2005    13612x  
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See also:
Tip 8989:Control codes "%%" in text entities.
Tip 8640:Text formatting codes in MText objects.
Tip 7191:How to increase the offset between MLeader text and underline?
Tip 4324:How to underline text in a MText object?
Tip 3123:Underlining one word and all Mtext is underlined.

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