Source Value

The total value to be spread.

Destination

The cells to which the system writes the results of the spread.

Weights (optional feature)

A range containing weight values to apply to the spread. This range contains the same number of cells as the destination range.

Add to Existing Values (optional feature)

Select this checkbox to take the spread amount to each cell and add it to any existing values already in the destination range. If you leave it blank, the amount spread to each cell overwrites the amounts in the destination cells.