Microsoft has recently updated Microsoft Paint, specifically for users in the Windows Insiders group. This update includes two new features that were previously reported on. One of the features is the ability to add, delete, or adjust layers in the side tool panel. The other feature complements the layer functionality by allowing users to open and save PNG files with transparent backgrounds. This greatly enhances the convenience of using the layer function. These new features will gradually be rolled out to Windows Insiders.
TLDR: Microsoft has rolled out updates for Microsoft Paint, providing users in the Windows Insiders group with two new features: layer control in the side tool panel and the ability to open and save PNG files with transparent backgrounds.