If Excel filter is not working after certain row, for merged cells, on large files or on protected sheet, then see this post.

Whether you're tired of losing your spot when collaborating or you want to customize the way you view your data, sheet views in Microsoft Excel are for you.

If you can't delete a worksheet in your Excel workbook or the Delete Sheet option is greyed out in Excel, follow these fixes.

Grid Lines Not Showing in Excel. You like to use gridlines when working with spreadsheets, but you've received an Excel spreadsheet without gridlines from someone else.