Learn how to insert a diagonal line to a cell in Microsoft Excel and Google Sheets using the Border feature, Drawing tool, Sparkline function, etc.

A thin line will separate the frozen column from the unfrozen columns. Steps to freeze multiple columns in Excel Click on the cell in row 1 in the column to the right of the columns you want to lock.

To change Gridline color in Excel, use Excel Options, apply a custom-colored border to the cells, or apply a custom line color. Full details here.