Here's how to select and copy all the text in a cell:

1. Select the cell
2. Press F2
3. Press SHIFT + HOME
4. From here, you can copy the contents of the cell
5. If you want to copy the result of a formula, press F9 first
6. Don't forget to press ESCAPE when you're finished

The reason this is useful is that sometimes when you copy a cell, doing other operations will remove the cut-copy mode and you'll lose the copy. Copying this way will retain the copy on the clipboard.

Download sheet to practise how to Select All Text In A Cell in Excel

Training Video on how to Select All Text In A Cell in Excel: