I was studying linear algebra and trying to get a visual “feel” for it through watching 3Blue1Brown’s “Essence Of Linear Algebra” series here

Essence Of Linear Algebra

Here, matrix multiplication is shown as the composition of 2 linear transformations. But I was wondering how we would interpret matrix addition/subtraction visually. I am not asking for $2$ by $1$ matrices since they would be equivalent to vector addition and subtraction respectively. But how would we interpret the addition of, say $2$ by $2$ matrices visually?