Preferences: Invoice options
The Invoice options panel of TimeCache Preferences offers a number of options for customizing TimeCache invoices.

Use job number for invoice number: When this option is checked, TimeCache uses the job number of the last project/matter clicked in the Project list for the Invoice number. That makes it useful primarily for users who invoice clients for one project at a time. This option works provided that the job number is a real number (i.e. composed only of numerals) and that there is not already a saved invoice using that number in your invoices file. If the job number does not meet both those conditions, TimeCache enters the next available real number.

Show invoiced entries on Job Sheets: Tells TimeCache to show entries that have been invoiced on their respective Job Sheets. By default, TimeCache hides invoiced entries. You can opt to show invoiced entries on Job Sheets. If you do so, they appear in italics, as do listings for invoices. Option-clicking on a Job Sheet entry that has been invoiced results in a beep; these entries cannot be edited other than marking them. (Option clicking a Job Sheet entry for an invoice results in that invoice being shown if its Invoice file is currently open.)

Subtract invoice amounts from Job Sheet totals: After creating an invoice, TimeCache adds an Invoice entry to each Job Sheet that was included in the invoice. You can choose whether or not to have their totals included in the total charges displayed at the bottom of the Job Sheet. If this option is left unchecked, a Job Sheet will reflect the total for all work on a project. If it's checked, a Job Sheet will reflect the total for your work on a project, minus the amount invoiced for it. This option is turned on by default.

NOTE: If you use TimeCache invoices, you will probably want to leave one of the above two checkboxes checked to have the most accurate picture of your billings.

Overdue invoice listing color: TimeCache shows all invoices in your current invoice file in its Invoice panel, along with their balance and creation date. You can choose to set special colors for displaying up to three overdue periods, each with their own time intervals in days. Setting a particular color for each overdue interval helps you quickly identify overdue invoices in the Invoice panel.

To use these settings, enter an overdue interval in the first box (e.g. 30 days), and then choose a color to represent that overdue interval by clicking the square to the right and choosing a color from the Color Picker that appears. Then do the same thing with the second overdue period, and finally do the same with the third.