Enter -1 into an empty cell somewhere. Select that cell and click
<copy. Then highlight the column that you want to change and click on
Edit | Paste Special | Values (check) | Multiply (check) | OK then
<Enter.

Note that this will change negative numbers to positive.

Hope this helps.

Pete

On Jan 22, 1:57*am, JMason wrote:
I have a long column of numbers I want to change from positive numbers to
negitive numbers. *I know I can multiply the column by -1 then copy and paste
as a value, but I was hoping there was a simple command to shorten the
process.