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.

If you want to create multiple worksheets in multiple Excel workbooks, you can set the default number of worksheets when you open Excel.

How to Change the Orientation of a Worksheet to Landscape in Microsoft Excel. By changing the orientation of a worksheet to Landscape mode, you're making the page wider than it is tall, so more ...