There's a type of text box in an Excel file that is associated with a cell and appears only when you select that cell uniquely (e.g., by clicking on it or moving to it with cursor keys). Hovering over it doesn't do it; selecting it as part of a range doesn't do it. It's somehow like a comment, only that cells with comments show a little red mark on the upper-right corner of the cell, and the comments appear when you hover over the cell.
What the worksheet normally looks like: no text box appearing:
What it looks like when the cell is selected: text box appears:
What are these text boxes called, and how do I make them?
1 Answer
That text box is a validation hint.
Use Data>Data Validation and enter a title and message on the Input Message tab:
