Fitting "Tuck-In" Corners

Slipcover Slideshow
Here are some pictures from a slipcover slide show on website.
As shown in this slide show, when making slipcovers, each section is individually cut, fit & sewn before a sew the sections together. After cutting the fabric from the roll, each piece of fabric is laid on the furniture "inside out", which makes it easy to pin to shape.

This not a "how to do it" slide show, but merely a "how it was done."