In this digital paperless world, which I support and encourage, I would like to find a way to digitally add the word 'PAID' in large red letters across an invoice before digitally filing it. (Just like the old-fashioned method when one used a rubber stamp)
Is this available in Word, or in fact anywhere else? if so.....Please advise how I can do this.

In anticipation of a positive reply,

'Many thanks'

RFC7