MS Excel
To center worksheet titles across a range of cells, you must

Select the cells containing the title text plus the range over which the title text is to be centered
Select the cells containing the title text plus the range over which the title text is to be enfettered
Format the cells with the comma style
Widen the columns

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MS Excel
Which tool you will use to join some cells and place the content at the middle of joined cell?

From Format Cells dialog box select the Centered alignment
From Format Cells dialog box click on Merge Cells check box
Click on Merge and Center tool on formatting toolbar
From Format Cells dialog box choose Merge and Center check box

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