normal size. To distinguish between variables defined in input files (like
@code{twentyFour} in the example above) and variables of internal
objects, we will call the latter @q{properties} and the former
-@q{identifiers.} So, the stem object has a @code{thickness} property,
-while @code{twentyFour} is an identifier.
+@q{variables.} So, the stem object has a @code{thickness} property,
+while @code{twentyFour} is an variable.
-@cindex properties vs. identifiers
-@cindex identifiers vs. properties
+@cindex properties vs. variables
+@cindex variables vs. properties
Two-dimensional offsets (X and Y coordinates) as well as object sizes
(intervals with a left and right point) are entered as @code{pairs}. A