Significance of multiple layout panels (grid and stackpanel) on the outside of uielement

A Layout Panel (grid and stackpanel) is placed on the external side of a uielement or multiple uielements, which can be used for unified management (not important). In addition, it is more important: it can expand the valid range of the uielement operation. (For example, if a small image is not easy to operate with the mouse, a gird is placed on the outer side of the image to make the grid wider, and some functions of the image can be operated through gird. Of course, check whether the image has the mouse operation Deviation Function)

Significance of multiple layout panels (grid and stackpanel) on the outside of uielement