Hello Natalia El-Shbeir ,

Please make sure on the Project Settings you saved the option "Allow source editing" and then follow this procedure:

1. Open the appropriate file in Trados Online Editor.
2. Select the target area of the source segment that you want to modify.
3. On the Home tab, in the Segments group, select Other Actions > Edit Source.
4. Make the necessary changes in the source segment, and then select another target row.

Hope this can help you.

Hello Natalia El-Shbeir ,

Please make sure on the Project Settings you saved the option "Allow source editing" and then follow this procedure:

1. Open the appropriate file in Trados Online Editor.
2. Select the target area of the source segment that you want to modify.
3. On the Home tab, in the Segments group, select Other Actions > Edit Source.
4. Make the necessary changes in the source segment, and then select another target row.

Hope this can help you.