Date setting, antecedent transactions

This is a new business and the software is brilliant for our use.
The partners made setting up payments prior to us adopting this software.
For the life of me, I cannot find out how to make entries with an antecedent date, also how do I set the date for each transaction?
Any assistance would be greatly appreciated.

Just put in the dates the transactions were made in place of the default date (today’s date).

Thanks, Really appreciated.
I did try that but it didnt appear to work - but ill try it again.