If you cannot insert, add or create new cells in worksheets in Microsoft Excel, remove cell protection and unmerge the Rows to begin with.

Adding a text to a cell in Excel using Formula requires use of ampersand operator, CONCAT function, or the LEFT, RIGHT, and LEN functions.

Click the Alignment tab and check the Wrap text checkbox. Click OK. Add your text to the cells. Excel now automatically wraps the text and resizes the cell as needed. Use Forced Line Breaks.

Another way—and for many experienced Excel users this is their preference—is to add a comment inside a formula. There will be no sign of the comment in the cell; instead, it will appear in the formula ...