Footnotes are great for giving extra information without taking up too much space. Because there is a finite amount of space on each slide in PowerPoint, footnotes may be just what you need. You can add them to your next presentation as follows.
Open PowerPoint and navigate to the slide where you want to insert a footnote. Insert a number or symbol next to the text that needs a footnote.
Now you have to create the number or symbol you have inserted as superscript footnote indicator. Highlight the character by clicking on it and dragging it with your mouse.
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Select in the "Font" group of the "Start" tab, the "Dialog box" dialog box, this is the small icon in the lower right of the "Font" group. 
The "Font" window appears. Select the box next to "Superscript" in the "Effects" group. Click the "OK" button to continue.
The selected text is now displayed as superscripted text.
Now add the actual footnote. On the "Text" tab of the "Insert" group, select the "Header and footer" option.
The "Header and Footer" window appears. Select the check box next to & # 39; Footer & # 39; Enter the number or symbol that you used for the footnote indicator, and then enter the footnote text. When done, select the "Apply" button.
The footnote is now inserted.
Repeat this process for each slide that requires a footnote.
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