There are a few customization options that are specific to the Nextstep port. For example, they affect things such as the modifier keys and the fullscreen behavior. To see all such options, use M-x customize-group RET ns RET.
The following variables control the behavior of the actual modifier keys:
ns-alternate-modifier
ns-right-alternate-modifier
The left and right Option or Alt keys.
ns-command-modifier
ns-right-command-modifier
The left and right Command keys.
ns-control-modifier
ns-right-control-modifier
The left and right Control keys.
ns-function-modifier
The Function (fn) key.
The value of each variable is either a symbol, describing the key for
any purpose, or a list of the form
(:ordinary symbol :function symbol :mouse symbol)
,
which describes the modifier when used with ordinary keys, function keys
(that do not produce a character, such as arrow keys), and mouse clicks.
If the symbol is one of control
, meta
, alt
,
super
or hyper
, this describes the Emacs modifier it
represents. If symbol is none
, Emacs does not use the
key, which retains its standard behavior. For instance, the
Option key in macOS is then used for composing additional
characters.
The variables for right-hand keys, like ns-right-alternate-modifier
,
may also be set to left
, which means to use the same behavior as
the corresponding left-hand key.
ns-use-proxy-icon
This variable specifies whether to display the proxy icon in the titlebar.
ns-confirm-quit
This variable specifies whether to display a graphical confirmation dialog on quitting.
ns-auto-hide-menu-bar
This variable specifies whether the macOS menu bar is hidden when an
Emacs frame is selected. If non-nil
the menu bar is not shown unless
the mouse pointer is moved near to the top of the screen.
ns-use-native-fullscreen
This variable controls whether to use native, or non-native fullscreen. Native fullscreen is only available on macOS 10.7 and above.
These variables only apply to macOS 10.7 (Lion) and above.
ns-use-mwheel-acceleration
This variable controls whether Emacs ignores the system mousewheel
acceleration. When nil
each ‘click’ of the mousewheel will
correspond exactly with one mousewheel event. When non-nil
,
the default, each ‘click’ may correspond with more than one mousewheel
event, depending on the user’s input.
ns-use-mwheel-momentum
This variable controls whether Emacs ignores the system ‘momentum’
when scrolling using a trackpad. When non-nil
, the default, scrolling
rapidly may result in the buffer continuing to scroll for a short
while after the user has lifted their fingers off the trackpad.
ns-mwheel-line-height
This variable controls the sensitivity of scrolling with the trackpad.
Apple trackpads scroll by pixels, not lines, so Emacs converts the
system’s pixel values into lines. When set to a number, this variable
sets the number of pixels Emacs will consider as one line. When
nil
or a non-number the default line height is used.
Setting a lower number makes the trackpad more sensitive, and a higher number makes the trackpad less sensitive.