When it comes to formatting combo box text in Excel, there are a few things you need to keep in mind. First and foremost, you need to make sure that the text is legible and easy to read. Secondly, you need to ensure that the text is properly aligned within the combo box. Lastly, you need to make sure that the combo box itself is properly sized so that it doesn't take up too much space on the worksheet.
In terms of legibility, one of the most important things you can do is use a clear, sans-serif font such as Arial or Helvetica. These fonts are easy to read at small sizes and will make sure that your combo box text is legible even when it's displayed at a small size. You should also avoid using excessively long words or phrases in your combo box text; keep it short and sweet so that users can easily understand what they're seeing.
As far as alignment goes, you'll want to make sure that your combo box text is properly aligned within the box. The easiest way to do this is to use the "Align" tool in the Excel ribbon. Simply select your combo box, click the "Align" button, and then choose how you want your text to be aligned (left, center, right, etc.). You can also use this tool to adjust the vertical alignment of your combo box text if needed.
Finally, you'll need to make sure that your combo box itself is properly sized. If it's too small, users will have difficulty reading the text; if it's too large, it will take up too much space on the worksheet. The best way to find a good size for your combo box is to experiment with different sizes until you find one that looks good and is easy to use.