MS Excel
What symbol is used before a number to make it a label ?

_ (underscore)
' (apostrophe)
" (quote)
= (equal)

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MS Excel
How do you insert a row?

Select the row heading where you want to insert the new row and select Edit >Row from the menu
Right-click the row heading where you want to insert the new row and select Insert from the shortcut menu
All of the listed here
Select the row heading where you want to insert the new row and click the Insert Row button on the standard toolbar

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