blog post updated for table font sizes, #728, metanorma/metanorma-iso…

…#1089

_posts/2024-03-20-iso-old-layouts.adoc

@@ -240,3 +240,14 @@ add an empty column at the left, for instance:
 |===
 ```
 
+=== Different font sizes in the table
+
+By default, the Metanorma uses one font-size for whole table rendering. Usually, the font size is
+equal the font size of the main text or smaller. In some earlier publications the different font
+sizes are using in the table, especially in the header. The different font-size can be achieved
+via the CSS command (https://www.metanorma.org/author/topics/inline_markup/text_formatting/#css),
+for example:
+
+```
+^|[css font-size:65%]#Number# ^| [css font-size:65%]#Symbol# ^| [css font-size:65%]#Designation#
+```