Field help (ACVCODACT) 

Enter up to 5 alpha numeric characters that identify the Activity Code. 

Be sure to follow the correct naming conventions:

Codes starting with A - V are developed in the Standard layer.

Codes starting with X are Add-ons developed by partners with a unique ID distributed by Sage.

Codes starting with Y are developed in the Vertical layer.

Codes starting with Z are for specific or unique development.

An activity code can be set to Active or Inactive, or can define the number of blocks on a screen.

This option, which must be assigned at  folder creation, makes it possible to influence the screen layout and possibly the database structure.