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A scalloped outline around what has changed since the last issue.
Also known as: Change cloud, Revision marking
A scalloped cloud drawn around part of a drawing marks what has changed at the current revision, usually with a numbered triangle. It belongs to the drawing's history rather than to the part, and is normally removed at the next issue.
Encircles the area changed at the current revision, usually accompanied by a numbered triangle keyed to the revision table.
Contexts: Technical drawing
Describes the drawing rather than the part, and is conventionally removed when the next revision is issued.
Contexts: Technical drawing
A closed outline made of a chain of small arcs bulging outwards, drawn around part of a view.