• keep track of every change made to the code in the different processes/events.
• restore the code from a given date, if this code was mistakenly deleted or modified since.

• the project,
• windows and pages,
• reports,
• queries,
• classes,
• sets of procedures.

Enabling the code history

1. On the "Inicio" tab, in the "Entorno" group, expand "Opciones" and select "Code editor options".
2. On the "Code" tab, check "Guardar historial de cambios del código".
   

• To disable the code history, uncheck this option.
• If several modifications are performed in the code of a project, the size of the files containing the code history can become quite large.

Viewing the code history

1. Display the process whose history must be viewed.
2. On the "Código" tab, in the "Otras acciones" group, expand "Historial" and select "Show history of modifications". The history window appears.
   
3. Click the versions to the left of the window to scroll through the changes made on the current process. This window allows you to:
   • view the differences between the selected element and the current version ().
   • print the version shown ().
   • delete the current modification.

Restoring a code in the history

1. View the current processing history: under the "Código" pane, in the "Otras acciones" group, pull down "Historial" and select "View modification history".
2. Find the code to restore.
3. Select the code to restore (using the mouse, Ctrl + A, etc.).
4. Copy the selected code to the clipboard (Ctrl + C).
5. Close the code history window.
6. In the code window, select the code to replace (with the mouse, Ctrl + A, etc.).
7. Paste the clipboard content (Ctrl + V).

Clearing the code history

1. Go to the process or event for which you want to clear the history.
2. On the "Código", in the "Otras acciones" group, expand "Historial" and select "Clear history".

Note The code history window can also be used to delete the current modification (button ).

History of a line of code (project found in the SCM (Source Code Manager))

When a project is in the SCM, the code editor proposes an advanced history of the line of code.

During a click on the date, a tooltip allows you to:

• Find out since when the modification was performed.
• View the code modification: In this case, the SCM window for comparing code versions is launched.
• View all changes: In this case, the SCM window for comparing versions of the current item is launched.
• Access element history: In this case, the SCM window listing the history of current modifications is launched.

• Option "Date and Author" enabled: Under the panel "Vista", in the group "Ayuda edición", check the option "Mostrar fecha y autor" (F6 key).
  
• Lines of code must have been modified and reintegrated in version 19 or higher.

Saving the code history

• WDP: history of events associated with the project.
• WDW: window event history.
• WWH: history of events associated with pages (WEBDEV only).
• WDC: class code history.
• WDE: history of events associated with states.
• WDR: history of events associated with queries.
• WDG: code history of procedure collections (or server procedures).
• WWN: code history of browser procedure collections (WEBDEV only).

• deleted directly in Windows Explorer.
• cleared from the code editor.

• the next modifications made to the code will be automatically saved,
• the files will be recreated if necessary.