2 files changed, 33 insertions, 0 deletions
diff --git a/keyboards/ploopyco/trackball_thumb/keymaps/drag_scroll/keymap.c b/keyboards/ploopyco/trackball_thumb/keymaps/drag_scroll/keymap.c
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index 0000000000..03202cc8f7
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+++ b/keyboards/ploopyco/trackball_thumb/keymaps/drag_scroll/keymap.c
@@ -0,0 +1,30 @@
+/* Copyright 2021 Colin Lam (Ploopy Corporation)
+ * Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
+ * Copyright 2019 Sunjun Kim
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT( /* Base */
+        KC_BTN4, KC_BTN1, KC_BTN3, KC_BTN2, KC_BTN5,
+        MO(1)
+    ),
+    [1] = LAYOUT(
+        _______, _______, _______, _______, _______,
+        DRAG_SCROLL
+    )
+};
diff --git a/keyboards/ploopyco/trackball_thumb/keymaps/drag_scroll/readme.md b/keyboards/ploopyco/trackball_thumb/keymaps/drag_scroll/readme.md
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index 0000000000..22119b7ef9
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+++ b/keyboards/ploopyco/trackball_thumb/keymaps/drag_scroll/readme.md
@@ -0,0 +1,3 @@
+# The Drag Scroll keymap for Ploopyco Thumb Trackball
+
+This is a sample keymap showing off what you can do with the custom callback drivers.