Left control and alt

Use the left control and the left alt key.

quantum/quantum_keycodes.h

@@ -183,6 +183,7 @@ enum quantum_keycodes {
 #define ALTG(kc) (kc | QK_RCTL | QK_RALT)
 #define SCMD(kc) (kc | QK_LGUI | QK_LSFT)
 #define SWIN(kc) SCMD(kc)
+#define LCA(kc) (kc | QK_LCTL | QK_LALT)
 
 #define MOD_HYPR 0xf
 #define MOD_MEH 0x7
@@ -339,6 +340,7 @@ enum quantum_keycodes {
 #define ALL_T(kc) MT((MOD_LCTL | MOD_LSFT | MOD_LALT | MOD_LGUI), kc) // see http://brettterpstra.com/2012/12/08/a-useful-caps-lock-key/
 #define SCMD_T(kc) MT((MOD_LGUI | MOD_LSFT), kc)
 #define SWIN_T(kc) SCMD_T(kc)
+#define LCA_T(kc) MT((MOD_LCTL | MOD_LALT), kc) // Left control and left alt
 
 // Dedicated keycode versions for Hyper and Meh, if you want to use them as standalone keys rather than mod-tap
 #define KC_HYPR HYPR(KC_NO)