rich text
Rich text in 
Gambas is a string using a subset of the 
html format.
The following HTML markups are allowed:
<p> <br/> <a> <font> <b> <i> <s> <sub> <sup> <small> <tt> <u> <h1> <h2> <h3> <h4> <h5> <h6>.
The 
<font> markup understands the following attributes:
face, 
color, and 
size.
The 
size attribute can be:
  - 
A value between 
1 and 7 for an absolute font size.
 
  - 
-1 for a smaller font size.
 
  - 
+1 for a larger font size.
 
  
Any 
html entity can be used.
Rich text is mainly used by 
TextLabel, 
GridView cells, and the 
Draw.RichText Method.