Settings

Settings has four parts: personalization, features, backup and updates.

Language & Format

Language: English, Français or العربية, for the whole app. Arabic turns the app right to left. Each invoice also has its own language, so you can work in one and invoice in another.
Amount format and Date format: how numbers and dates are written everywhere in the app.
Default currency: the currency your dashboard and reports add up in, and the one every other currency has a rate against. Choose it once, before your first document; after that it is locked, because every invoice and quote is stated against it.

Numbering: which invoices count up together: a series per client (the default), a series per business, or one series for everything. Quotes always have their own series. See Numbering.
Invoice prefix and suffix, such as INV or a year code: letters and numbers only.
Include year, Include month and Include business name: added to the names of the files you export, so a folder of PDFs sorts itself.

Switches the app between light and dark. The button at the top of every screen does the same.

Turn on only what you use. Each switch adds or removes a part of the app, never your data:

Quotes, Reports, Style profiles and Presets.
UBL 2.1 (PEPPOL BIS Billing 3.0) and XRechnung (UBL 2.1): adds e-invoice export to invoices. See E-invoices.
Receipt printing: adds a receipt button to invoices and quotes, for an 80 mm receipt printer. See PDF, printing and receipts.

Export saves every record and setting to one file.
Import restores such a file. It replaces what the database holds, so the app asks first.

See Your data for good backup habits.

The installed app looks for a new version by itself. Check for update looks right away.