What functionality can users customize regarding how a worksheet is displayed?

The ability to customize the display of a worksheet by choosing whether to include grid lines is a fundamental aspect of enhancing readability and user experience in spreadsheet applications. Grid lines serve as visual guides that can assist users in tracking and organizing data effectively. By enabling or disabling grid lines, users can tailor the worksheet's appearance to their preferences or to better suit the needs of the data being presented. This customization is particularly useful for highlighting specific cells or ranges without the distraction of grid lines, or conversely, it allows for a more structured view when necessary.

Other options do not pertain to the display customization of a worksheet. For instance, adding new authors focuses on collaborative functionalities and permissions rather than display options. Changing the overall workbook theme relates to the aesthetic appeal on a broader scale, affecting the entire workbook rather than specific worksheet settings. Restricting access to other users addresses security and permissions rather than the visual display. Thus, the choice regarding grid lines is the only one that directly influences how the worksheet is visually presented to the user.