How to edit or create new Numbering Method related to Sales Proposals, Customer Shipments, Shipping Orders and Invoices?
In the main menu, Click on: CONFIGURATION -> PROCESS MANAGEMENT -> NUMBER RANGES
STEP 1: Create or Edit a Number Range
1. Click on NEW NUMBER RANGE or click on EDIT 
2. Insert a NAME
3. Select the ENTITY TYPE from dropdown list
4. When finished, click on SAVE CHANGES
STEP 2: To Create the code pattern of the number, click on NEW NUMBER RANGE in the dialog internal grid
1. Insert the CODE (you want to be shown in the number like SP, CS, SO, SPM, ETC...)
2. Give the number range an understandable NAME (like "SP2017")
3. Insert the YEAR
4. Select the RANGE STARTS number (usually 01 unless immigrating with other software and need to keep the number)
5. Insert the RANGE ENDS number
6. Choose the appearance of the number by placing the following parameters in the order you want it to present
7. When finished, click on SAVE CHANGES