diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 0dd4358..8ea6b05 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,10 +13,10 @@
             "state": {
               "type": "pdf",
               "state": {
-                "file": "HCIW/slides/Gestural interaction.pdf"
+                "file": "HCIW/slides/Zooming interfaces.pdf"
               },
               "icon": "lucide-file-text",
-              "title": "Gestural interaction"
+              "title": "Zooming interfaces"
             }
           }
         ]
@@ -190,8 +190,9 @@
   },
   "active": "9247ae5d7ced22e9",
   "lastOpenFiles": [
-    "Concurrent Systems/notes/images/Pasted image 20250408091924.png",
     "HCIW/slides/Gestural interaction.pdf",
+    "HCIW/slides/Zooming interfaces.pdf",
+    "Concurrent Systems/notes/images/Pasted image 20250408091924.png",
     "Concurrent Systems/notes/images/Pasted image 20250408093840.png",
     "Concurrent Systems/notes/images/Pasted image 20250408094749.png",
     "Concurrent Systems/notes/images/Pasted image 20250408092853.png",
diff --git a/HCIW/slides/Zooming interfaces.pdf b/HCIW/slides/Zooming interfaces.pdf
new file mode 100644
index 0000000..a1d4ca4
Binary files /dev/null and b/HCIW/slides/Zooming interfaces.pdf differ