English to Spanish Tech/Engineering Textiles / Clothing / Fashion

As in:

WHY TRIM AND GRADE SEAM ALLOWANCES?
You can sew a lovely neat seam and press it perfectly, but if you don't trim and grade those seams where necessary you will be left with a bulky, bumpy appearance on the right side of the garment. Trimming refers to reducing a seam allowance to prevent bulk. Grading is used in an enclosed seam to reduce the bulk created by the layered seam allowances. Trim, grade, and press in the right places and your seams will look as smooth as silk.
https://fancycollective.com/blogs/sew-easy/how-to-trim-and-g...

Can't find the Spanish translation, "graduar" doesn't seem to come up in that context. Thank you in advance for any suggestions!