Function FontSize have no effects in pdf page.
Dim oPDF As panda_com.clsPDF
Dim oPage As panda_com.clsPage
Set oPage = oPDF.NewPage(PANDA_PAGESIZE_A4)
oPDF.FontSize = 10
oPage.TextBox 10, 60, 40, 160, "FONT 10"
oPDF.FontSize = 20
oPage.TextBox 50, 60, 80, 160, "FONT 20"
oPDF.PDFClose