diff --git a/datasets/submission/preparation-guide.qmd b/datasets/submission/preparation-guide.qmd
index f156f33..46d109e 100644
--- a/datasets/submission/preparation-guide.qmd
+++ b/datasets/submission/preparation-guide.qmd
@@ -7,29 +7,29 @@ Before you submit your data, please make sure
 ```
     DATASET_{IDENTIFIER}
     |--- METADATA
-    | |--- dataset.xml (contains: Dataset)
-    | |--- policy.xml (contains: Policy)
-    | |--- image.xml (contains: Images)
-    | |--- annotation.xml (contains: Annotations) 
-    | |--- observation.xml (contains: Observations)
-    | |--- observer.xml (contains: Observers)
-    | |--- sample.xml (contains: Biological Beings, Cases (if present), Specimens, Blocks and Slides)
-    | |--- staining.xml (contains: Stainings)
+    |    |--- dataset.xml (contains: Dataset)
+    |    |--- policy.xml (contains: Policy)
+    |    |--- image.xml (contains: Images)
+    |    |--- annotation.xml (contains: Annotations) 
+    |    |--- observation.xml (contains: Observations)
+    |    |--- observer.xml (contains: Observers)
+    |    |--- sample.xml (contains: Biological Beings, Cases (if present), Specimens, Blocks and Slides)
+    |    |--- staining.xml (contains: Stainings)
     |---IMAGES
-    | |--- IMAGE_{IDENTIFIER}*
-    | | |--- *.dcm files of an Image
-    | |--- IMAGE_{IDENTIFIER}*
-    | | |--- *.dcm files of an Image
+    |    |--- IMAGE_{IDENTIFIER}*
+    |    |    |--- *.dcm files of an Image
+    |    |--- IMAGE_{IDENTIFIER}*
+    |    |    |--- *.dcm files of an Image
     |--- ANNOTATIONS+
-    | |--- *.geojson
+    |    |--- *.geojson
     |--- LANDING_PAGE***
-    | |--- landingpage.xml (contains: Landing Page) 
-    | |--- THUMBNAILS
-    | | |--- *.jpg
+    |    |--- landingpage.xml (contains: Landing Page) 
+    |    |--- THUMBNAILS
+    |    |    |--- *.jpg
     |--- PRIVATE**** - not shared with users
-    | |--- rems.xml - not shared with users
-    | |--- organisation.xml - not shared with users
-    | |--- datacite.xml (contains: DataCite, optional) - not shared with users
+    |    |--- rems.xml - not shared with users
+    |    |--- organisation.xml - not shared with users
+    |    |--- datacite.xml (contains: DataCite, optional) - not shared with users
 
     *    The root of the folder must be the written as "DATASET_{IDENTIFIER}" with
          IDENTIFIER being either the accession ID of the Dataset generated by the