There are a few terms used to describe the process of changing the genes that line a DNA molecule, depending on the specific context and techniques involved:

* Genetic engineering: This is the broadest term, encompassing any technique used to alter an organism's genetic makeup.

* Gene editing: This refers to the specific techniques used to target and modify specific genes within the DNA sequence.

* Genome editing: This is a subset of gene editing, specifically focusing on making changes to the entire genome of an organism, not just individual genes.

* CRISPR-Cas9: This is a specific type of gene editing technology that has become very popular and efficient in recent years.

It's important to note that the terms are not always used interchangeably, and the specific term used will depend on the context of the discussion. For example, "gene editing" is a more specific term than "genetic engineering," and "CRISPR-Cas9" is a specific type of gene editing technology.