How do I transfer funds from checking to deposit into cash reserves?
Write a check or enter an Expense or transfer funds. All three work to record real money movements you have made. If you just want to trick yourself into thinking you have less in the bank to work with you can add a false bank account to "move" funds to. You want it and your working account to be sub accounts of the one tied to bank feeds. Your internal money movements cannot be reconciled as it never happens in real life