What function does the font size button perform?

The font size button is specifically designed to adjust the size of the text within a cell. When you click on this button, you can select a larger or smaller font size, which will make the text appear bigger or smaller in relation to the other elements in your spreadsheet. This is an essential feature for enhancing visibility and ensuring that the text is appropriately sized for the desired presentation or readability.

While there are functionalities in spreadsheet software that allow you to merge cells, add borders, or change cell colors, these involve different tools or buttons in the interface. Merging cells combines two or more cells into one, adding borders focuses on the outlines around the cells, and changing cell colors alters the background of the cell. Each of these tasks serves a distinct purpose but does not impact the text size, which is solely the function of the font size button.