Final answer:
Only from the Format Cells dialog box can you access advanced features like custom number formats and cell protection settings. These options provide powerful ways to customize and secure your data presentation in a spreadsheet.
Step-by-step explanation:
A feature that can only be accessed from the Format Cells dialog box in spreadsheet software like Microsoft Excel includes the ability to create custom number formats. This tool provides extensive formatting options that are not available from the standard toolbar or ribbon. For example, you can define new formats for dates, times, numbers, or text, and even create formats that change based on the value of a cell (such as color-coding positive and negative numbers).
Another advanced feature accessible from the Format Cells dialog box is the ability to adjust cell protection settings, which is a part of setting up worksheet security. By navigating to the Protection tab, users can lock cells or hide formulas to prevent them from being altered by others.