How to Easily Create Large Square Matrices in PowerPoint
Overview
In PowerPoint, when you want to include a large square matrix, you had no choice but to do it manually. However, I’ve discovered a tip related to the two-dimensional format that I would like to introduce.
Guide

Enter the size N of the matrix by typing a special character ■ followed by the matrix size N in the equation, then click the [Equation]-[2D format] button.

As an example that is difficult to create manually, $I_{9} \in \mathbb{R}^{9 \times 9}$ can be easily created as ■9.

