fix docstrings. provide 2 methods scalefontsizes now, with and without an argument. no argument version resets to initial values, with argument you rescale the current sizes.

src/components.jl

@@ -297,13 +297,23 @@ function scalefontsize(k::Symbol, factor::Number)
     f.pointsize = round(Int, factor * f.pointsize)
     default(k, f)
 end
+
+"""
+    scalefontsizes(factor::Number)
+
+Scales all **current** font sizes by `factor`. For example `scalefontsizes(1.1)` increases all current font sizes by 10%. To reset to initial sizes, use `scalefontsizes()`
+"""
 function scalefontsizes(factor::Number)
     for k in (:titlefont, :guidefont, :tickfont, :legendfont)
         scalefontsize(k, factor)
     end
 end
 
-"Resets font sizes to initial default values"
+"""
+    scalefontsizes()
+
+Resets font sizes to initial default values.
+"""
 function scalefontsizes()
   for k in (:titlefont, :guidefont, :tickfont, :legendfont)
       f = default(k)