I share your interest in customizing macro buttons with personal images, however, the information you provided seems to be meant for Word 2007 and 2010. It appears to lack relevant instructions for the versions of Word from 2017, 2019, and moving forward. In fact, the diagrams look to be out of date and the instructions are quite challenging to follow.

Could you possibly guide us through the process, step by step, but this time focusing on the most recent versions of Microsoft Office like the 2017, 2019, or even 2021 version?
I greatly appreciate your help with this.