An editing application may allow a user to change a literal property value
of an object in a conventional manner. The functionality of the editing
application may be expanded to allow a user to access non-literal values
for property values, by allowing the user to define a calculation based
on one or more sources. To indicate that an associated property value of
an object is a non-literal value, a non-literal cue may be presented to
the user, such as through the display of the object, the associated
property indicator, and/or the associated property value. To reduce the
learning curve of the expanded functionality, the user interface for
literal values of a property may remain minimally impacted, while,
alternative gestures associated with the object, property indicator,
and/or property value may be used to allow access to the non-literal
value controls or information.