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Editing File: /usr/share/X11/xkb/symbols/ctrl

// Eliminate CapsLock, making it another Ctrl.
partial modifier_keys
xkb_symbols "nocaps" {
    replace key <CAPS> { [ Control_L, Control_L ] };
    modifier_map  Control { <CAPS>, <LCTL> };
};

// Make the left Ctrl key a left Meta.
xkb_symbols "lctrl_meta" {
    replace key <LCTL> { [ Meta_L ] };
    modifier_map  Mod4 { <LCTL> };
};

// Swap the functions of the CapsLock key and the left Ctrl key.
partial modifier_keys
xkb_symbols "swapcaps" {
    replace key <CAPS> { [ Control_L ] };
    replace key <LCTL> { [ Caps_Lock ] };
    modifier_map Control { <CAPS> };
    modifier_map  Lock { <LCTL> };
};

// Swap the functions of the CapsLock key and the left Ctrl key,
// but make the Ctrl key a 'Hyper' modifier
partial modifier_keys
xkb_symbols "swapcaps_hyper" {
    replace key <CAPS> { [ Control_L ] };
    replace key <LCTL> { [ Hyper_L ] };
    modifier_map Control { <CAPS> };
    modifier_map Mod3 { <LCTL> };
};

// Set CapsLock to left Ctrl and left Ctrl to switch layout.
partial modifier_keys
xkb_symbols "swapcaps_and_switch_layout" {
    replace key <CAPS> { [ Control_L ] };
    replace key <LCTL> { [ ISO_Next_Group ] };
    modifier_map Control { <CAPS> };
    modifier_map  Lock { <LCTL> };
};

// Move Ctrl to the leftmost key on the middle row and CapsLock to the
// leftmost key on the bottom row.  Only works if the geometry or keycodes
// file has defined appropriate aliases for the keys in question.
partial modifier_keys
xkb_symbols "ac_ctrl" {
    replace key <AC00> { [ Control_L ] };
    replace key <AA00> { [ Caps_Lock ] };
    modifier_map  Control { <AC00> };
    modifier_map  Lock    { <AA00> };
};

// Move Ctrl to the leftmost key on the bottom row and CapsLock to the
// leftmost key on the middle row.  Only works if the geometry or keycodes
// file has defined appropriate aliases for the keys in question.
partial modifier_keys
xkb_symbols "aa_ctrl" {
    replace key <AA00> { [ Control_L ] };
    replace key <AC00> { [ Caps_Lock ] };
    modifier_map  Control { <AA00> };
    modifier_map  Lock    { <AC00> };
};

// Right Ctrl functions as another right Alt.
partial modifier_keys
xkb_symbols "rctrl_ralt" {
    key <RCTL> { symbols[Group1]= [ Alt_R ] };
    modifier_map Mod1{ <RCTL> };
};

// Menu key functions as another right Ctrl.
partial modifier_keys
xkb_symbols "menu_rctrl" {
    replace key <MENU> { [ Control_R, Control_R ] };
    modifier_map Control { Control_L, <MENU> };
};

// Right Alt key functions as another right Ctrl.
partial modifier_keys
xkb_symbols "ralt_rctrl" {
    replace key <RALT> { type[Group1] = "TWO_LEVEL",
                         symbols[Group1] = [ Control_R, Control_R ] };
    modifier_map Control { <RALT> };
};

// Swap the functions of the left Alt key and the left Ctrl key.
partial modifier_keys
xkb_symbols "swap_lalt_lctl" {
    replace key <LALT> { [ Control_L, Control_L ] };
    replace key <LCTL> { [ Alt_L, Meta_L ] };
    modifier_map Mod1    { <LCTL> };
    modifier_map Control { <LALT> };
};

// Swap the functions of the left Win key and the left Ctrl key.
partial modifier_keys
xkb_symbols "swap_lwin_lctl" {
    replace key <LWIN> { [ Control_L ] };
    replace key <LCTL> { [ Super_L ] };
    modifier_map Mod4    { <LCTL> };
    modifier_map Control { <LWIN> };
};

// Swap the functions of the right Win key and the right Ctrl key.
partial modifier_keys
xkb_symbols "swap_rwin_rctl" {
    replace key <RWIN> { [ Control_R ] };
    replace key <RCTL> { [ Super_R ] };
    modifier_map Mod4    { <RCTL> };
    modifier_map Control { <RWIN> };
};

// Map Ctrl to the left Alt key, Alt to the left Win key,
// and Super to the left Ctrl key.
partial modifier_keys
xkb_symbols "swap_lalt_lctl_lwin" {
    replace key <LALT> { [ Control_L, Control_L ] };
    replace key <LWIN> { [ Alt_L, Meta_L ] };
    replace key <LCTL> { [ Super_L ] };
    modifier_map Mod1    { <LWIN> };
    modifier_map Mod4    { <LCTL> };
    modifier_map Control { <LALT> };
};

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