For this video, Eleanor Burns shows how to press the seams. Instead of squaring up the log cabin quilt block, she says this design is forgiving if some are off size. If the block is 3/4 inch large, then you should trim it up.
The second part of the video shows many examples of log cabin quilts. Plus Eleanor shows you one of her first log cabin quilt books.
Log Cabin Quilt — Quilting Techniques