Saving of ABAP List-Based PI Sheets 

Use

If you need to leave a PI sheet before it has been fully processed, you can save the entered data without reporting it; see Saving ABAP List-Based PI Sheets.

You can still change the data after you have saved it.

Besides the values, the system also saves the cursor position. This means that on accessing the PI sheet again, you will be taken to the place where you were before leaving the PI sheet.