Open your Google Slides presentation and select the text you want to superscript.

Click on "Format" in the top menu.

Hover over "Text", then select "Superscript" from the dropdown menu.

The selected text will now appear in superscript format.

Alternatively, use the shortcut Ctrl + . (Windows) or Cmd + . (Mac) to quickly apply superscript.

Repeat the process to remove superscript formatting if needed.