Some companies have set the default document number.

To prevent user select other document number, access right is set in user role.

1. Go to Maintenance > User Roles

2. Go to Users to set the role to user. 

3. Go to Permission > Transactions > Select Doc Number

4. Tick the documents to allow user to Select Doc Number. For example, tick Purchase Requisitions

The document number can be selected in the system.

5. Untick the documents to block user to Select Doc Number

The document number will be dim and user cannot select other doc number.