MS Excel
Documentation should include

Source of input data
All of these
Information on the purpose of the workbook
Destination and users of the output data

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MS Excel
To view a cell comment

Click the display comment command on the window menu
Click the comment command on the view menu
Position the mouse pointer over the cell
Click the edit comment command on the insert menu

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MS Excel
You can auto fit the width of column by

Double click on the cell pointer in worksheet
Double clicking on the column left border of column header
Double clicking on column right border on column header
Double clicking on the column name on column header

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