SharePoint gets its default icons from the .\TEMPLATE\LAYOUTS\1033\IMAGES folder. You can change the image files found
there to customize the icons used throughout SharePoint.
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.