diff --git a/.gitignore b/.gitignore
index a2efa56..0ed2fda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,7 @@
 
 # Log files
 *.log
+
+# Kalamar templates describing your corpus (created on demand by `make korap`,
+# see KALAMAR_TEMPLATES). Track them in your own repository if you like.
+/custom/
diff --git a/Makefile b/Makefile
index 2488165..3fca452 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,14 @@
 KALAMAR_INSTANCE ?=
 KALAMAR_INSTANCE_DIR := $(abspath $(KALAMAR_INSTANCE))
 
+# Directory with Kalamar templates describing your own corpus, mounted into the
+# kalamar container. Put a doc/corpus.html.ep page there to replace Kalamar's
+# placeholder corpus page; KorAP-Docker's custom/README.md lists the available
+# templates and ships examples. The directory is created on demand.
+#   make korap KALAMAR_TEMPLATES=my-corpus-docs
+KALAMAR_TEMPLATES ?= custom
+KALAMAR_TEMPLATES_DIR := $(abspath $(KALAMAR_TEMPLATES))
+
 # Optional: override the kalamar container image (e.g. a locally built tag).
 # The instance's compose.instance.yaml already defaults to a renderer-capable
 # image; set this to test a specific build, e.g.
@@ -205,7 +213,8 @@
 	java -jar lib/Krill-Indexer.jar -c lib/krill.cfg --progress -i $(subst " ",;,$^) -o $@
 
 korap: check-src $(TARGET_DIR)/index
-	curl -s https://raw.githubusercontent.com/KorAP/KorAP-Docker/master/compose.yaml | sed 's/64543:64543/$(KORAP_PORT):64543/g' | COMPOSE_PROFILES='export,open,lite' INDEX='$(TARGET_DIR)/index' $(if $(KALAMAR_INSTANCE),KALAMAR_INSTANCE_DIR='$(KALAMAR_INSTANCE_DIR)') $(if $(KALAMAR_IMAGE),KALAMAR_IMAGE='$(KALAMAR_IMAGE)') docker compose -p korap -f - $(if $(KALAMAR_INSTANCE),-f '$(KALAMAR_INSTANCE_DIR)/compose.instance.yaml') up
+	mkdir -p '$(KALAMAR_TEMPLATES_DIR)'
+	curl -s https://raw.githubusercontent.com/KorAP/KorAP-Docker/master/compose.yaml | sed 's/64543:64543/$(KORAP_PORT):64543/g' | COMPOSE_PROFILES='export,open,lite' INDEX='$(TARGET_DIR)/index' KALAMAR_TEMPLATES='$(KALAMAR_TEMPLATES_DIR)' $(if $(KALAMAR_INSTANCE),KALAMAR_INSTANCE_DIR='$(KALAMAR_INSTANCE_DIR)') $(if $(KALAMAR_IMAGE),KALAMAR_IMAGE='$(KALAMAR_IMAGE)') docker compose -p korap -f - $(if $(KALAMAR_INSTANCE),-f '$(KALAMAR_INSTANCE_DIR)/compose.instance.yaml') up
 
 $(TARGET_DIR)/index.tar.xz: $(TARGET_DIR)/index
 	tar -I 'xz -T0' -C $(dir $<) -cf $@ $(notdir $<)
diff --git a/Readme.md b/Readme.md
index 180924d..65256fd 100644
--- a/Readme.md
+++ b/Readme.md
@@ -26,6 +26,30 @@
 
 Then open the corresponding URL (e.g., http://localhost:64544) in your browser.
 
+### Describing your corpus in the user interface
+
+The KorAP UI has a *Corpus* entry in its documentation menu that shows a
+placeholder page until you describe the corpus you are serving. To fill it,
+put a `doc/corpus.html.ep` template into the `custom` directory:
+
+```bash
+mkdir -p custom/doc
+$EDITOR custom/doc/corpus.html.ep
+make korap
+```
+
+Such a template is mostly HTML, with `<%= ... %>` for embedded Perl; a file
+ending in `.html.md` is rendered as Markdown instead. KorAP-Docker's
+[custom/README.md](https://github.com/KorAP/KorAP-Docker/blob/master/custom/README.md)
+lists the templates you can provide -- including a references page stating how
+your corpus should be cited -- and ships commented examples.
+
+Use `KALAMAR_TEMPLATES` to keep those templates elsewhere:
+
+```bash
+make korap KALAMAR_TEMPLATES=my-corpus-docs
+```
+
 ### Testing a Kalamar instance's customizations
 
 By default the KorAP UI comes up as stock Kalamar. To test the config and