This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Generalized Input
Mathematica's unique structure allows a generalized notion of input, in which not only ordinary text, but also typeset structures, diagrams, graphics, control objects and even complete user interfaces can be entered and immediately return values that have been associated with them.
Controls as Input
DynamicSetting display as a control that dynamically gives its setting when evaluated
Ctrl+Shift+Enter evaluate in place to show the displayed form
Checkbox  ▪ PopupMenu  ▪ ColorSetter  ▪ FileNameSetter  ▪ SetterBar  ▪ ...
Manipulate set up a collection of controls
Giving Interpretations
Interpretation specify any interpretation for a graphic or other expression
Graphics as Input
Graphics, Graphics3D use any graphic as input