add add_footnote_adv (temp name) for html table
diff --git a/man/spec_font_size.Rd b/man/spec_font_size.Rd
index 9688dec..cdd7465 100644
--- a/man/spec_font_size.Rd
+++ b/man/spec_font_size.Rd
@@ -5,7 +5,7 @@
 \title{Generate common font size for continuous values}
 \usage{
 spec_font_size(x, begin = 8, end = 16, na_font_size = 12,
-  scale_from = NA)
+  scale_from = NULL)
 }
 \arguments{
 \item{x}{continuous vectors of values}