diff --git a/pkg/fonts.el b/pkg/fonts.el
index edfefd9..82a61e0 100644
--- a/pkg/fonts.el
+++ b/pkg/fonts.el
@@ -84,9 +84,9 @@
         ((>= 1920 (x-display-pixel-height))
          (set-font +custom-font +custom-font-size))
 
-        ;; 4K screen on Windows
+        ;; 4K screen on Windows or Linux
         ((>= 2160 (x-display-pixel-height))
-         (set-font +custom-font (+ +custom-font-size 6)))
+         (set-font +custom-font (- +custom-font-size 5)))
 
         ;; Default
         (t (set-font +custom-font (+ +custom-font-size 2)))))
diff --git a/pkg/sys-specific.el b/pkg/sys-specific.el
index 94d59d7..a378e5d 100644
--- a/pkg/sys-specific.el
+++ b/pkg/sys-specific.el
@@ -65,6 +65,16 @@
 ;;;;;;;;; Mac-specific config ;;;;;;;;;;;;;;;;;;;;;
 (if IS-GNU
     (progn
+      ;;;; Save and undo
+      (define-key +custom-keys-mode-map (kbd "s-s") 'save-buffer)
+      (define-key +custom-keys-mode-map (kbd "s-z") 'undo)
+      (define-key +custom-keys-mode-map (kbd "s-a") 'mark-whole-buffer)
+
+      ;;;;;;;; Copy and paste bindings ;;;;;;;;;;;;;;;;;;
+      (define-key +custom-keys-mode-map (kbd "s-x") 'kill-region)
+      (define-key +custom-keys-mode-map (kbd "s-v") 'yank)
+      (define-key +custom-keys-mode-map (kbd "s-c") 'kill-ring-save)
+
       ;;;;;;;;; Linux Ergo bindings (fix) ;;;;;;;;;;;;;;;;;;
       (define-key +custom-keys-mode-map (kbd "C-<right>") 'end-of-line)
       (define-key +custom-keys-mode-map (kbd "C-<left>") 'beginning-of-line)