If you want to remove the Header and Footer in PowerPoint, click on Insert tab and click on Header and Footer. Here, uncheck the Footer option and click on Apply.

To edit a footer in your PowerPoint slides and include citations or notes, you'll need to access the Header & Footer menu from the Insert tab.

Launch Microsoft PowerPoint 2010 on your computer and open the presentation from which you want to remove the hidden footer. Click the "Insert" tab at the top of the PowerPoint window.