When it comes to working with underlines in Excel, there are a few things you need to understand. First and foremost, underlines are used to indicate cell values that are not visible in the worksheet. This can be helpful when you're trying to troubleshoot a formula or figure out why a certain cell is returning an error. To see the underlined cells, simply click on the cell and then press the F2 key. The underlined values will be revealed in the formula bar.
Another thing to keep in mind is that underlines can also be applied to text within a cell. This can be done by using the Format Cells dialog box. Simply select the cells you want to format, then click on the Font tab and check the Underline box. You'll have a few different options to choose from, including single, double, and thick underlines.
Finally, it's important to note that you can also use underlines to create tables in Excel. This can be done by selecting a range of cells, then clicking on the Insert tab and choosing Table. In the resulting dialog box, you'll have the option to add headers and footers, as well as choose from a variety of table styles.
So there you have it! A quick overview of underlines in Excel. Be sure to experiment with them a bit to get a feel for how they work. And if you have any questions, feel free to post them in the comments section below.