To transfer funds between bank accounts, you can create a funds transfer. Go to the Accounting > Accounts page, click on the 3-dot menu on the top left, and select New Funds Transfer.
A new window will appear for entering in the transfer information. Select the company and site, the two bank accounts to transfer funds between, and set the date and amount (and a memo note if needed).
Keep in mind that this only creates the transaction for tracking in Property Matrix. The actual money transfer will still have to be set up with the financial institutions in question.
If you need to transfer funds between companies, a journal entry will need to be created. This is due to a pass-through account being required for each company in order for each company's books to balance. Simply crediting one company's bank account will cause that company's debits and balance to no longer balance, even if the overall balance for all companies combined still balance.
Transferring funds between non-bank accounts also require a journal entry. Please refer to Adding Manual Transactions / Journal Entries for information on creating journal entries.