2012

Table Of Contents
helix An open 2D or 3D spiral. (HELIX)
Help menu The legacy way to access online Help. In the current version of
AutoCAD, you can find Help on the InfoCenter toolbar or by pressing F1.
HLS For hue, lightness, and saturation. A system of defining color by specifying
the amount of hue, lightness, and saturation.
Home view A special view saved with the drawing that is controlled through
the ViewCube tool. The Home view is similar in concept to the default, initial
view presented when a drawing is first opened.
horizontal landing An optional line segment connecting the tail of a leader
line with the leader content.
horizontal ribbon The ribbon, when it is oriented across the top of the file
window.
hot grip A selected grip.
i-drop A method by which a drawing file can be dragged from a Web page
and inserted into another drawing.
IGES For Initial Graphics Exchange Specification. A standard format for digital
representation and exchange of information between CAD/CAM systems. In
AutoCAD-based products, the commands to import and export IGES files are
available only in AutoCAD Mechanical.
Illuminance In photometry, illuminance is the total luminous flux incident
on a surface per unit area.
indirect bump scale Scales the effect of the base materials bump mapping
in areas lit by indirect light.
indirect illumination Illumination techniques such as global illumination
and final gathering, that enhance the realism of a scene by simulating radiosity,
or the interreflection of light between objects in a scene.
initial environment The variables and settings for new drawings as defined
by the default drawing template, such as acad.dwt or acadiso.dwt. See also
template drawing.
input property In a dynamic block definition, a parameter property other
than that of a lookup, alignment, or base point parameter that you can add
Glossary | 2305