\bind "M-m S-L space" "math-limits empty"
-\bind "M-m n" "math-number"
-\bind "M-m S-N" "math-nonumber"
+\bind "M-m n" "math-number-toggle"
+\bind "M-m S-N" "math-number-line-toggle"
\bind "M-m 8" "math-insert \infty"
\bind "M-m o 1" "self-insert \#1"