How does PPT process color photos into Black-and-white photos?

How does PPT process color photos into Black-and-white photos?

Original

1, first, click the "Insert > Picture" option, in the pop-up file box to find their own to deal with the picture open, as shown in the picture.

2, then, click on the "Format" tab under the "Crop" tool, the image will not need to cut off the edge, as shown in the picture.

3, after the completion of the crop, select the picture, click the right mouse button to select the "Format Picture" option, as shown in the picture.