Powerpoint

Hi Sarath

I'm not fully understanding what you're trying to achieve so please post more details if my response is not what you require.

You can remove all background images from a slide by going to DESIGN tab, CUSTOMIZE group - FORMAT BACKGROUND. Beneath the fill options you should see a TICK BOX that says HIDE BACKGROUND GRAPHICS.

By removing all background graphics you can then rebuild the slide.

I hope this resolves your issue.

Kind regards

Dennis