To add one of the slides in a PowerPoint file to the graphics editing software, you can't do that by pasting all the way through the normal editing window of PowerPoint, "Select all → copy", because the conversion method does not paste the background, the motherboard image, into other software. There are three kinds of solutions:
1. Through normal view
If your normal view default effect includes thumbnails, right-click the thumbnail of the slide you want to convert, select Copy from the shortcut menu, and then open the graphics editing software to paste.
2. Through the Notes page view
If your normal view default effect does not include thumbnails, you can convert them through the notes page view. Show the slide in the edit window by using the scroll bar, then click Notes Page on the View menu, and select the slide thumbnail in the Notes page view to perform the action in 1.
3. Slide Sorter View
If you want to convert multiple slides, and your normal view default effect does not include thumbnails, you can navigate through the view of the light slice to convert. Click Slide Sorter Under the View menu to select a thumbnail of a slide that needs to be converted in slide sorter view, perform the action in 1, and repeat repeatedly to quickly convert multiple slides to pictures.
In the end you can edit any of the graphics editing software.