MS Excel
Long text can be broken down into many lines within a cell. You can do this through

Justify in Edit > Cells
Wrap Text in Format > Cells
All of above
Text Wrapping in Format > Cells

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MS Excel
If you need to remove only the formatting done in a range (numbers and formula typed there should not be removed), you must

Click on Remove Formatting tool on Standard Toolbar
From Edit menu choose Delete
Double click the Format Painter and then press Esc key in keyboard
From Edit menu choose Clear and then Formats

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