This article explains how to hide and reset the Excel scroll bars. Instructions apply to Excel for Microsoft 365, Excel 2019, Excel 2016, Excel 2013, and Excel 2010.
Reset Scroll Bar in Excel | Horizontal and Vertical Scroll Bars Are Small | Recalibrate Scroll Bars
By default, Excel displays horizontal and vertical scroll bars at the bottom and right sides of the Excel screen, but you can hide them. To increase the worksheet viewing area, hide the horizontal and vertical scroll bars.
In the Excel Options dialog box, select Advanced.
Scroll down to the Display options for this workbook section (about halfway down).
