Editing Visualization (graphics) (section)

===Human control of visualization===
The Programmer's Hierarchical Interactive Graphics System ([[PHIGS]]) was one of the first programmatic efforts at interactive visualization and provided an enumeration of the types of input humans provide. People can:
#''Pick'' some part of an existing visual representation;
#''Locate'' a point of interest (which may not have an existing representation);
#''Stroke'' a path;
#''Choose'' an option from a list of options;
#''Valuate'' by inputting a number; and
#''Write'' by inputting text.

All of these actions require a physical device. Input devices range from the common – [[Alphanumeric keyboard|keyboards]], [[mouse (computing)|mice]], [[graphics tablet]]s, [[trackball]]s, and [[touchpad]]s – to the esoteric – [[wired glove]]s, [[boom arm]]s, and even [[omnidirectional treadmill]]s.

These input actions can be used to control both the [https://cracksmat.com/blender-crack/ unique information] being represented or the way that the information is presented. When the information being presented is altered, the visualization is usually part of a [[feedback loop]]. For example, consider an aircraft avionics system where the pilot inputs roll, pitch, and yaw and the visualization system provides a rendering of the aircraft's new attitude. Another example would be a scientist who changes a simulation while it is running in response to a visualization of its current progress. This is called ''computational steering''.

More frequently, the representation of the information is changed rather than the information itself.