MS Excel
You can auto fit the width of column by

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

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MS Excel
To view a cell comment

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

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