Hi D_N_A,

Yes, you can definitely reduce the number of columns in your Excel sheet. Here's how you can do it:

1. Open your Excel sheet and select the column(s) you want to delete. You can do this by clicking on the column letter(s) at the top of the sheet.
2. Right-click on the selected column(s) and choose "Delete" from the drop-down menu.
3. A dialog box will appear asking you to confirm the deletion. Make sure to select "Entire column" and click "OK".
4. The selected column(s) will be deleted and the remaining columns will shift to the left to fill the gap.
5. Repeat this process for any additional columns you want to delete.
6. Once you have deleted the desired columns, save your Excel sheet.

By reducing the number of columns in your sheet, you should find that the horizontal scroll bar becomes more sensitive and easier to use. This will make it easier for you to work with your charts and other data.