In the dressmaking process, you will find yourself working with various types of patterns, some more uniquely shaped than others.
Sewing Tip: When working with larger patterns or those that have extended corners and edges, it is good practice to pin these temperamental areas first before securing the rest of the sewing pattern to the fabric underneath.
However, don't forget that as a very first step in the pattern pinning process, the pattern should be aligned perfectly on grain based on the pattern's indicated grainline. A few pins should be inserted through the actual grainline and fabric layer(s) underneath to secure the whole pattern on grain first- securing pattern corner and extended edges comes second.
Pinning pattern corners and extended portions before moving on to the pattern's longer edges, will stabilize the paper pattern and allow it to lay flatter as you are pinning the remaining, longer edges. This is especially helpful when securing very large patterns that need to stay uniformly flat across the entire fabric surface as they are pinned and cut.