The grid is a worksheet and is created by gridlines.
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Initially you will see a splash screen showing the name of the application, in this case Excel. That appears as Excel loads. When Excel has finished loading, you will see a blank worksheet, which is a grid of columns headed by letters and rows headed by numbers. The Sheet will initially be called Sheet1 and the document will be Book1.
It is a single block in the grid on the Excel screen, formed by the intersection of a column and row.
The letters in the heading above a worksheet grid are called column names.
The numbers in the heading to the left of a worksheet grid are called row names.
You do not add more grid lines, they are present for all displayed cells. But, you can turn the grid lines on or off. In Excel 2007, go to the Page Layout tab in the Sheet Options and turn the grid lines on or off by checking or unchecking the box in front of View (under Grid Lines).
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Grid Recordings was created in 2000.
The Green Grid was created in 2007.
The Grid - newspaper - was created in 2011.
Grid chess was created in 1953.
Grid Compass was created in 1982.