I keep mis-using UPPER|LOWER/SLASH, and getting RESET.

With RESET shifted to the UPPER+LOWER layer, it is now time to change that key to Alt-Slash, which, in Emacs, does automatic word completion

keyboards/planck/keymaps/cbbrowne/keymap.c

@@ -94,6 +94,7 @@ enum macro_id {
 #define SHIFTQUOTE MT(MOD_RSFT, KC_QUOT)
 #define ALTRIGHT MT(MOD_LALT, KC_RGHT)
 #define MVERSION M(M_VERSION)
+#define ALTSLASH LALT(KC_SLSH)
 
 
 /* Note that Planck has dimensions 4 rows x 12 columns */
@@ -109,13 +110,13 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 [_RAISE] = { /* RAISE */
   {KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC},
   {_______, KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS},
-  {_______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  QWERTY,  KEYPAD,  KEYPAD,  RESET,   _______},
+  {_______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  QWERTY,  KEYPAD,  KEYPAD,  ALTSLASH,_______},
   {_______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY}
 },
 [_LOWER] = { /* LOWER */
   {KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR, KC_ASTR, KC_LPRN, KC_RPRN, KC_BSPC},
   {_______, KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS, KC_PLUS, KC_LCBR, KC_RCBR, KC_PIPE},
-  {_______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  QWERTY,  KEYPAD,  KEYPAD, RESET,   _______},
+  {_______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  QWERTY,  KEYPAD,  KEYPAD, ALTSLASH,   _______},
   {_______, KEYPAD, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY}
     },
 [_KEYPAD] = { /* Key Pad */