Editing Technical drawing (section)

===Views===

====Multiview====
{{Main article|Multiview orthographic projection}}
Multiview is a type of [[orthographic projection]]. There are two conventions for using multiview, first-angle and third-angle. In both cases, the front or main side of the object is the same. First-angle is drawing the object sides based on where they land. Example, looking at the front side, rotate the object 90&nbsp;degrees to the right. What is seen will be drawn to the right of the front side. Third-angle is drawing the object sides based on where they are. Example, looking at the front side, rotate the object 90&nbsp;degrees to the right. What is seen is actually the left side of the object and will be drawn to the left of the front side.

====Section====
While multiview relates to external surfaces of an object, [[Cross section (geometry)|section]] views show an imaginary plane cut through an object. This is often useful to show voids in an object.

====Auxiliary====
Auxiliary views utilize an additional projection plane other than the common planes in a multiview. Since the features of an object need to show the true shape and size of the object, the projection plane must be parallel to the object surface. Therefore, any surface that is not in line with the three major axis needs its own projection plane to show the features correctly.

====Pattern====
{{also|Rabattement (drafting)}}
Patterns, sometimes called '''developments''', show the size and shape of a flat piece of material needed for later bending or folding into a three-dimensional shape.<ref>Goetsch et al. (2000), p. 341</ref>

====Exploded====
{{Main article|Exploded-view drawing}}
[[Image:Gear pump exploded.svg|thumb|[[Exploded-view drawing]] of a [[gear pump]]]]

An ''exploded-view drawing'' is a technical drawing of an object that shows the relationship or order of [[manufacturing|assembly]] of the various parts.<ref name="US PTO05">{{cite web|url=http://www.uspto.gov/web/offices/pac/doc/general/#drawing |title=General Information Concerning Patents § 1.84 Standards for drawings |date=January 2005 |access-date=13 February 2009 |website=[[United States Patent and Trademark Office|USPTO.gov]] |archive-url=https://web.archive.org/web/20090130105045/http://www.uspto.gov/web/offices/pac/doc/general/#drawing |archive-date=30 January 2009 |url-status=dead}}</ref> It shows the components of an object slightly separated by distance or suspended in surrounding space in the case of a three-[[dimension]]al exploded diagram. An object is represented as if there had been a small controlled [[explosion]] emanating from the middle of the object, causing the object's parts to be separated relative distances away from their original locations.

An [[Exploded-view drawing|exploded view drawing]] (EVD) can show the intended assembly of mechanical or other parts. In mechanical systems, the component closest to the center is usually assembled first or is the main part inside which the other parts are assembled. The EVD can also help to represent the disassembly of parts, where those on the outside are normally removed first.<ref>Michael E. Brumbach, Jeffrey A. Clade (2003). ''Industrial Maintenance''. Cengage Learning, 2003 {{ISBN|0-7668-2695-3}}, p.65</ref>