These parameters supply forms of interactions between different frames.
nil, this means that this frame is a child frame (see Child Frames), and this parameter specifies its parent frame. If
nil, this means that this frame is a normal, top-level frame.
nil, this parameter specifies another frame whose deletion will automatically trigger the deletion of this frame. See Deleting Frames.
nil, this parameter specifies the frame whose windows will be scrolled whenever the mouse wheel is scrolled with the mouse pointer hovering over this frame, see Mouse Commands.
nil, then this frame is not eligible as candidate for the functions
previous-frame(see Finding All Frames) and
other-frame, see Frame Commands.
frame-auto-hide-functionwhen quitting the frame's only window (see Quitting Windows) and there are other frames left.
nil, Emacs will by default make this frame invisible whenever the minibuffer (see Minibuffers) is exited. Alternatively, it can specify the functions
delete-frame. This parameter is useful to make a child frame disappear automatically (similar to how Emacs deals with a window) when exiting the minibuffer.
nil, then Emacs will try to keep the frame's size (width and height) ratios (see Size Parameters) as well as its left and right position ratios (see Position Parameters) unaltered whenever its parent frame is resized.
If the value of this parameter is
nil, the frame's position and
size remain unaltered when the parent frame is resized, so the position
and size ratios may change. If the value of this parameter is
Emacs will try to preserve the frame's size and position ratios, hence
the frame's size and position relative to its parent frame may change.
More individual control is possible by using a cons cell: In that case
the frame's width ratio is preserved if the car of the cell is
width-only. The height ratio is preserved if
the car of the cell is either
left position ratio is preserved if the cdr of the cell is either
left-only. The top position ratio is preserved if
the cdr of the cell is either