%%% Auxiliary macros %%%
-% Append #2 to the definition of #1
-\long\def\addto#1#2{\expandafter\def\expandafter#1\expandafter{#1#2}}
+% Prepend/append #2 to the definition of #1
+\long\def\prependef#1#2{\expandafter\def\expandafter#1\expandafter{#2#1}}
+\long\def\appendef#1#2{\expandafter\def\expandafter#1\expandafter{#1#2}}
%%% Page size and margins %%%