This is a PRO feature.
To set up a minimum amount deposit for all products, go to Partial Payment-> Setting-> Default Setting.
Step-1: Enable Partial By Default: Select Yes.
Step-2: Default Partial Type: Select Minimum Amount.
Step-3: Default Partial Amount: Enter the value of the minimum amount. For example, The product price is $100. And you want customers to pay at least $20 out of $100 to place the order. Also, Customers can pay any range of amounts from $20 to $100.
The Default Settings: