Certain picture symbols implicitly define characters to be inserted into the destination. These characters are referred to as the insert character, zero character, nonzero character, minus character, plus character, and dollar character.

The insert character is the character inserted into the destination by the picture symbol I. It is, by default, the period (.), and it can be changed by the introduction code N.

The zero character is used by the picture symbol D, and by the picture symbols E, F, and Z for leading zero replacement. It is, by default, the blank character, and it can be changed by the introduction code B.

The nonzero character is used by the picture symbol D. It is, by default, the comma (,), and it can be changed by the introduction code C.

The minus character is used by the picture symbols E, R, and S. The default minus character is the hyphen (-), and it can be changed by the introduction code M.

The plus character is used by the picture symbols E, R, and S. The default plus character is the plus sign (+), and it can be changed by the introduction code P.

The dollar character is used by the picture symbols F and J. The default dollar character is the dollar sign ($), and it can be changed by the introduction code U.