Build 4.0.0.48 of xlsgen adds more rendering capabilities related to headers and footers in spreadsheets.
In the previous build, what was added were even header/footer, first page header/footer as well as the corresponding rendering capabilities. What's added now is the support in rendering scenarios (print, preview, PDF, ...) for font tags in those headers and footers.
To get a list of existing font tags, take a look at xlsgen
documentation.
Font tags include font name, size, color, bold, italic, strikethrough, underline, superscript, subscript. Font tags are hidden to the Excel user, he/she just uses the font dialog while in the header/footer settings. Of course they are very real when it comes to supporting them. Next time a spreadsheet is rendered with xlsgen, the header/footer will look nicer.