diff --git a/.obsidian/plugins/breadcrumbs/data.json b/.obsidian/plugins/breadcrumbs/data.json
index e4103cd7..8df4cdf2 100644
--- a/.obsidian/plugins/breadcrumbs/data.json
+++ b/.obsidian/plugins/breadcrumbs/data.json
@@ -631,7 +631,7 @@
           "prevs"
         ],
         "lock_view": false,
-        "lock_path": "convertir un djvu en pdf.md"
+        "lock_path": "activer l'OCR sur un pdf.md"
       },
       "tree": {
         "collapse": false,
diff --git a/.obsidian/plugins/quickadd/data.json b/.obsidian/plugins/quickadd/data.json
index 81a7d094..6961b92e 100644
--- a/.obsidian/plugins/quickadd/data.json
+++ b/.obsidian/plugins/quickadd/data.json
@@ -15,7 +15,7 @@
       },
       "format": {
         "enabled": true,
-        "format": "```breadcrumbs\ntitle: \"Sous-notes\"\ntype: tree\ncollapse: false\nshow-attributes: [field]\nfield-groups: [downs]\ndepth: [0, 0]\n```"
+        "format": "```breadcrumbs\ntitle: \"Sous-notes\"\ntype: tree\ncollapse: true\nshow-attributes: [field]\nfield-groups: [downs]\ndepth: [0, 0]\n```"
       },
       "insertAfter": {
         "enabled": false,
@@ -39,7 +39,8 @@
         "direction": "vertical",
         "focus": true,
         "mode": "default"
-      }
+      },
+      "activeFileWritePosition": "cursor"
     },
     {
       "id": "ac0147f7-d334-401f-8311-59113f6499ec",
diff --git a/activer l'OCR sur un pdf.md b/activer l'OCR sur un pdf.md
new file mode 100644
index 00000000..2e9a6da4
--- /dev/null
+++ b/activer l'OCR sur un pdf.md	
@@ -0,0 +1,10 @@
+---
+up:
+  - "[[conversion de fichiers]]"
+tags:
+  - s/informatique
+aliases:
+  - enable ocr in a pdf file
+---
+
+`pdfsandwich file.pdf`
\ No newline at end of file
diff --git a/conversion de fichiers.md b/conversion de fichiers.md
index 7f1a6152..1ba028e3 100644
--- a/conversion de fichiers.md	
+++ b/conversion de fichiers.md	
@@ -9,7 +9,7 @@ aliases:
 ```breadcrumbs
 title: "Sous-notes"
 type: tree
-collapse: false
+collapse: true
 show-attributes: [field]
 field-groups: [downs]
 depth: [0, 0]
diff --git a/convertir un djvu en pdf.md b/convertir un djvu en pdf.md
index 6e815ecb..dd01a650 100644
--- a/convertir un djvu en pdf.md	
+++ b/convertir un djvu en pdf.md	
@@ -6,3 +6,5 @@ tags:
 aliases:
 ---
 
+`ddjvu -format=pdf input.djvu output.pdf`
+
diff --git a/sources/1 - articles/Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk).pdf b/sources/1 - articles/Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk).pdf
index 04fd44a1..4a0bbea1 100644
Binary files a/sources/1 - articles/Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk).pdf and b/sources/1 - articles/Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk).pdf differ
diff --git a/the weird and wonderful chemistry of audioactive decay.md b/the weird and wonderful chemistry of audioactive decay.md
index 8fa5a596..632a520e 100644
--- a/the weird and wonderful chemistry of audioactive decay.md	
+++ b/the weird and wonderful chemistry of audioactive decay.md	
@@ -7,5 +7,3 @@ aliases:
 pdf: "[[sources/1 - articles/Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk).pdf]]"
 ---
 
-![[sources/1 - articles/Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk).pdf#page=180&rect=98,365,295,385|Open problems in communication and computation (Cover, T. M., 1938-, Gopinath, B) (z-library.sk, 1lib.sk, z-lib.sk), p.180]]
-