Необходимо создать кнопку в станд экране в группе функций CJWB:
экран 1210 - WBS Element Basic Data
1215 - WBS Element, Customer Enhancement

необходимо добавить в 1210 экран , 1215 используется для расширения экрана как понимаю ?!
в 1215 есть вызов
CALL customer-sUBSCREEN CUSTSCR1 INCLUDING 'SAPLXCN1' '0700'.

захожу в эту программу создаю 700 экран и в ней кнопку.
также создаю проект с расширением CNEX0007.

Что не так делаю, подскажите, пожайлуста!
не появляется кнопка на экране

Может быть типовые грабли: забыли активировать проект?

Все активно, появилась новая закладка РасширКлиента.
Как же добавить в экран поле , а не закладку?

Как говорится, дарёному коню в зубы не смотрят

Модифицируйте группу функций, если очень хочется.

Транзакция cj20n и cj13 используют группу функций указанную выше, но почему то расширение в cj20n срабатывает а в сj13 нет, что делать?

В документации IMG SAP по этому поводу написано:

Create Customer-Specific Fields in a WBS
The following SAP enhancement is available for WBS elements in the Project System:
• CNEX0007 Customer-specific fields in WBS elements
You can use this enhancement to add new customer-specific fields for the standard project definition in table PRPS To process these fields you can create your own screen, which the user can call up when maintaining standard project definitions.
The enhancement CNEX0007 contains the following enhancement components:
Menu entries:
SAPLCJGR+CUE Project planning board
SAPLCJWB+CUE Master data maintenance (CJ01, CJ02, CJ03)
Function exits:
EXIT_SAPLCJSS_004 for transferring data to your own program
EXIT_SAPLCJSS_005 for transferring data from your program to R/3
Screen areas:
SAPLCJSS0215_CUSTSCR1_SAPLXCN10700
Activities
1. Create the enhancement.
To do this, either create a new project or use an existing one.
2. Create structure CI_PRPS in ABAP/4-Dictionary (transaction SE11) in your own development class.
3. Expand structure CI_PRPS to include your own fields.
Note the following:
• You must use the name ranges reserved for customers.
• The maximum number of fields in database tables is 255 (in PRPS and CI PRPS - for SAP field and user-defined fields together). SAP reserves the right to add new fields to table PRPS; if the maximum number is reached, your user-defined fields could be excluded.
Activate the structure.
4. Maintain the enhancement components:
• Assign the function customer fields a name. To do this, double-cliedk the menu entries SAPLCJWB+CUE or SAPLCJGR+CUE and enter the name you want to have appear in the menu.
• Add to the program code for the function exit EXIT_SAPLCJWB_004. This function exit transfers SAP data to your part of the program.
To do this, call up the function module and double-click the include line. Create the include module.
In order to transfer the variables, you must insert a Move-corresponding statement in Include ZXCN1U21:
move-corresponding sap_prps_imp to prps.
Now define the "prps" data structure as global variable. To do this, jump to the main program SAPLXCN1. First, double click include LXCN1TOP and then include ZXCN1TOP. Create the object if required.
Include the following tables statement in the source text for include ZXCN1TOP.
* tables
tables prps.
• Add to the program code for the function exit EXIT_SAPLCJWB_005. This function exit takes the data from your part of the program and transfers it to the SAP standard program. Create your own corresponding include module.
In order to transfer the variables, you must insert a Move-corresponding statement in Include ZXCN1U22:
move-corresponding prps to cnci_prps_exp.
• Create the screen area.
Double-click SAPLCJSS0215_CUSTSCR1_SAPLXCN10700 and then choose Fullscreen . The screen has been preconfigured by SAP. You can delete these fields and add new ones:
Choose Goto -> Dict./Program fields
Maintain the table/field name PRPS and select the fields to appear on the screen.
Generate the screen.
For detailed information, see OSS Note number 86050.
5. Activate the project.
Only once you have activated the project, will your enhancement take effect.
Note for Batch-Input
If you want to fill your customer-specific fields later using batch-input you must take the screen SAPLCJSS 0205 into consideration.
For your customer-specific fields to be evaluated in the project information system, the structures in the project information system must be regenerated. To do this, start program RCNCT001.
Further Notes
Unlike modifications, enhancements are not influenced by a release upgrade because they are not part of the original SAP programs, rather, they exist in an area reserved for customers.
You can also find documentation for this enhancement in the enhancement transaction.

Пользовательский экран с добавленными элементами в транзакции CJ13 должен появиться не в виде закладки, а как отдельный экран при нажатии на пункт меню: Подробная информация -> поля клиента СПП-элемента