Establishing opening balances

I would like to know, how I can add opening balances.
For example if I have a receivable balance for year starting January 1 2014. and I am using this software for the first time in the month of May. How can I include that receivable balance as an opening balance?

Just enter an invoice with the date the invoice was created and it will post in your A/R.

See the Manager Wiki article - Manager Cloud