Editing Process Parameters in the PI Assistant 
Prerequisites
You want to edit a process parameter for the R/3 PI sheet.
You have created the process parameter in the master recipe and called the process instruction assistant (PI assistant); see
Editing Process Instructions in the PI Assistant.
If you can only define some of the process parameter data, such as the text of a control instruction, when you are in the process order, you can leave the relevant field blank in the master recipe.
Procedure

If you enter long texts now or in one of the following steps, note that paragraph and character formats are only taken into account in the browser-based PI sheet but not in the ABAP list-based PI sheet.
To create a new control instruction:
Create.To change the text for a control instruction:
Change.To delete a control instruction:
Select the control instruction and choose
Delete.
To add a new characteristic:
Choose
Insert and select the characteristic you want to use.
To assign a characteristic value:
.If the characteristic value is a long text, select the characteristic and choose
Change.
To delete a characteristic:
Select the characteristic and choose
Delete.
To create a new note:
Create.To change the text of a note:
Change.To delete a note:
Select the note and choose
Delete.
Copy and save the master recipe.
If you have not corrected all errors when exiting the process instruction assistant, the error log is displayed. To call up the PI assistant again and correct errors, you must, however, first choose
Continue to get back to the process instruction overview.