diff --git a/index.qmd b/index.qmd
index 1097b06..a09ec7c 100644
--- a/index.qmd
+++ b/index.qmd
@@ -2,8 +2,15 @@
 title: 'Book of Abstracts'
 listing:
   type: table
+  categories: true
   contents:
     - submissions/*/index.qmd
+  fields: [categories, title, author]
+  field-display-names: 
+    categories: 'Session'
+    author: 'Author(s)'
+  sort: 'categories'
+  sort-ui: [categories, title, author]
 date-modified: last-modified
 ---
 
diff --git a/submissions/445/index.qmd b/submissions/445/index.qmd
index 05568d7..12ea0ea 100644
--- a/submissions/445/index.qmd
+++ b/submissions/445/index.qmd
@@ -1,5 +1,6 @@
 ---
 submission_id: 445
+categories: 'Session 1B'
 title: Teaching the use of Automated Text Recognition online. Ad fontes goes ATR
 author:
   - name: Laura Bitterli
diff --git a/submissions/450/index.qmd b/submissions/450/index.qmd
index 14c9442..a42fbe2 100755
--- a/submissions/450/index.qmd
+++ b/submissions/450/index.qmd
@@ -1,5 +1,6 @@
 ---
 submission_id: 450
+categories: 'Session 1A'
 title: "Using GIS to Analyze the Development of Public Urban Green Spaces in Hamburg and Marseille (1945 - 1973)"
 author:
   - name: Eliane Schmid