# First Position Reserved

_cformat_ switch:  **P**

Code **P** may be used with editable cells (_cformat_ codes **E**, ** l **) to indicate that the first position (after any cell code bytes such as the color byte used with _cformat_ **B**) is reserved for either a space (indicating editable) or a ** | ** (vertical bar) indicating that the cell is not editable.

Note that the ** | ** prefix has long been supported as a code to indicate that the cell is disabled for editing, but it is sometimes awkward to use because of confusion over whether to shift the remaining characters over. The **P** option allows you to reserve a position (same concept as with the background cell color byte used with **B**), which may be easier to use, depending on your application logic.

Also note that feature is not necessary with the shared lists (_cformat_ **s** used with CellList or CellListX), because in those cases, a space is already reserved for a prefix code, in which ** | ** is already an option.