If you would like to bill a client for an initial deposit for your projects, and also have that deposit amount appear on future invoices, use the following steps:
1. Start your new project and go to the work tab and click the plus button at the bottom. In here, create a new expense named "Deposit Request" or something similar and enter the desired amount. Be sure to have an "expense" type for the item, as you will be billing for it and it is not yet a received deposit.
2. Create an invoice for the project by going to the Invoices tab and clicking the plus button. Studiometry should automatically select the deposit request expense, so you can simply send out the invoice as-is:
3. Once you receive this amount, you will mark the invoice as paid. This will show the balance of the project as zero, when it should actually be a negative balance (since they have already paid for the project but work hasn't been done yet). What you need to do is go back to the Project's work tab and enter the deposit amount into there. Click the plus button underneath the work list and select "Deposit" as the type for the new item and enter the amount. Note that the amount will appear as a negative because it will take away from what is owed for the project. After this your work tab should be as follows:
4. When you do work for the project and finally bill the client, it will show your work items as well as the deposit and calculate the remaining balance owed. You will also have a record of the payment made for the deposit, the invoice for the deposit, and both the deposit request and the actual deposit.
You can see above that the invoice total includes the initial deposit amount and shows the amount due as the correct amount.
There are other ways to handle this in Studiometry as well, so depending on how exactly you want your projects and calculations to appear, you may want to use this method or your might want to go about it a different way. Studiometry is a very flexible product that lets you use it however you'd like.