Index: 03_drawing_imp.html
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--- 03_drawing_imp.html	(revision 1745)
+++ 03_drawing_imp.html	(revision 1746)
@@ -82,6 +82,21 @@
 schematics. Cschem merely permits having such styles not by defining
 and hardwiring each of them in code, but by separating the looks from the works.
 
+<h2> text object and font  </h2>
+<p>{imp3:20} There are two ways to specify font geometry of a text object:
+<ol>
+	<li>{imp3:21} bbox based: when x2;y2 are specified; this is useful for
+	    fixed text objects placed on the sheet by the user; it's more important
+	    that these text objects, especially when multiline, stay in place and
+	    don't start to overlap with other objects than to have the exact font
+	    size matched.
+	<li>{imp3:22} pen height based: when the text object does not have
+	    x2;y2, pen height property is used; this is useful when the
+	    placement and approximate size of the text is important but
+	    bbox matching is not. This is the typical case in symbols.
+</ol>
+
+
 <h2> grouping  </h2>
 
 <p>{imp3:10} Cschem has only one kind of group and allows group-in-group.