Lengthen and shorten pattern
Also: Lengthen or shorten lines
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A basic pattern alteration performed at printed lengthen-or-shorten lines to change a garment's length in a chosen area without distorting its proportions or seam shapes.
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See also
Dart point relocation
The process of moving a dart's point closer to or farther from the bust or hip apex to correct fit or match a design change.
Rotate and true method
A dart manipulation technique in which a pattern section is rotated about a pivot point to close one dart while opening another, then the resulting cutting lines are redrawn smooth.
Bicep adjustment
A pattern alteration that adds or removes width in the upper sleeve to match an arm circumference that differs from the block's assumed bicep measurement.
Broad back adjustment
A pattern alteration that adds width across the upper back of a bodice pattern, usually by slashing and spreading, to accommodate a back broader than the block assumes.
Flat seat adjustment
A pattern alteration that removes excess width and length from the back of a trouser or skirt pattern below the waist to fit a seat flatter than the block assumes.
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