The modify-editor-pane-buffer function allows you to modify the contents and fill mode of a specified buffer.
The modify-editor-pane-buffer function modifies the editor pane according to the keyword arguments. The argument contents (if non- nil ) supplies a new string to place in the buffer. The flag , if given, sets the buffer-flag . If it is non- nil , fill causes the editor to fill each paragraph in the buffer. The argument fixed-fill sets the value of the slot fixed-fill and if non- nil causes the editor to fill each paragraph in the buffer.