diff --git a/src/main/java/com/annimon/imagetagger/logic/KeyProcessor.java b/src/main/java/com/annimon/imagetagger/logic/KeyProcessor.java
index de7d1d0..1f37445 100644
--- a/src/main/java/com/annimon/imagetagger/logic/KeyProcessor.java
+++ b/src/main/java/com/annimon/imagetagger/logic/KeyProcessor.java
@@ -3,6 +3,8 @@ package com.annimon.imagetagger.logic;
 import com.annimon.imagetagger.beans.TagButton;
 import com.annimon.imagetagger.views.ImagePanel;
 import com.annimon.imagetagger.views.TagPanel;
+import com.annimon.imagetagger.views.UIUtils;
+
 import java.awt.*;
 import java.awt.event.KeyEvent;
 import java.util.List;
@@ -55,6 +57,15 @@ public class KeyProcessor {
             case KeyEvent.VK_F3:
                 changeBackground();
                 break;
+            // Ctrl+Plus / Ctrl+Minus
+            case KeyEvent.VK_ADD:
+            case KeyEvent.VK_EQUALS:
+            case KeyEvent.VK_MINUS:
+                if ((e.getModifiersEx() & KeyEvent.CTRL_DOWN_MASK) == 0) break;
+                final float delta = (e.getKeyCode() == KeyEvent.VK_MINUS) ? -0.5f : 0.5f;
+                UIUtils.changeFontSize(imagePanel, delta);
+                tagPanel.changeFontSize(delta);
+                break;
             default:
                 final var key = getKeyAsString(e);
                 if (keys.contains(key)) {
diff --git a/src/main/java/com/annimon/imagetagger/views/TagPanel.java b/src/main/java/com/annimon/imagetagger/views/TagPanel.java
index 0739b06..0dfea0d 100644
--- a/src/main/java/com/annimon/imagetagger/views/TagPanel.java
+++ b/src/main/java/com/annimon/imagetagger/views/TagPanel.java
@@ -2,6 +2,7 @@ package com.annimon.imagetagger.views;
 
 import com.annimon.imagetagger.beans.TagButton;
 import com.annimon.imagetagger.beans.TagButtonHolder;
+
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
@@ -64,4 +65,9 @@ public class TagPanel extends JPanel {
             label.setToggled(containsTag);
         });
     }
+
+    public void changeFontSize(float delta) {
+        tagButtons.values().forEach(btn -> UIUtils.changeFontSize(btn.getLabel(), delta));
+        UIUtils.changeFontSize(this, delta);
+    }
 }
diff --git a/src/main/java/com/annimon/imagetagger/views/UIUtils.java b/src/main/java/com/annimon/imagetagger/views/UIUtils.java
new file mode 100644
index 0000000..159a620
--- /dev/null
+++ b/src/main/java/com/annimon/imagetagger/views/UIUtils.java
@@ -0,0 +1,18 @@
+package com.annimon.imagetagger.views;
+
+import java.awt.*;
+
+public class UIUtils {
+
+    public static void changeFontSize(Component component, float delta) {
+        final var font = component.getFont();
+        if (font == null) return;
+
+        final float size = font.getSize2D() + delta;
+        if (size <= 6) return;
+        if (size >= 32) return;
+
+        component.setFont(font.deriveFont(size));
+        component.repaint();
+    }
+}