Add content using text box
1. Create an excel document as a test, and click "Insert-text box-horizontal layout-vertical text box" in the excel menu bar, as shown in the following figure.
2. At this time, our mouse will show a downward arrow, drag the mouse to generate a text box, and then we can enter the text in it as the header.
3. After entering the text in the header, click and move the mouse. When the mouse turns into four direction arrows, drag the text box to the diagonal line header cell. In this way, the diagonal line is displayed. If we think the header text is incorrect or the position is incorrect, we can adjust it.
4. If you want to create a "multi-diagonal line header", we can create more text boxes in step 1"
Enter directly
1. You can also Enter the content directly in the header and press the "Alt + Enter" key to wrap the line. Then you can adjust the position.