Belege
The three are the same Beleg with a different kind, so they are the same editor too. What the customer sees, they see through a link and sign on whatever device is in their hand.

What you do with it
Groups and titles number themselves, and the article number is searched in the row — by NPK too, with the IC column for the installation code. You move through the positions by keyboard.
Quick calculation, target margin and mark-up, the margin per position and labour hours with a Funktionsstufe. The price dials sit under the quote.
Akonto, Skonto, Regie, variations, partial invoices, Rückbehalte and guarantee periods. The invoice comes with a QR invoice, with TWINT if you want, and in the customer's language.
The customer sees the quote through a link and signs on the device or accepts by email; the order confirmation goes out by itself. When the quote went out, and to whom, is shown beside it.
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Related articles
45 minutes using one of your jobs: from capture on site through to the certificate and invoice.