Select the cell and highlight the character(s) you want to format
Press Ctrl+1 to open Format Cells
Go to the Font tab
Check Superscript
Click OK
For a single character in a cell, edit the cell first, then select only that character and apply Superscript
Use the formula `=CHAR(185)` or `=CHAR(178)` for common superscript-like symbols where applicable
Use the Symbol menu to insert superscript characters if needed
Use Alt codes or Unicode superscript characters directly in the cell when available