diff --git a/tasks/slides.mk b/tasks/slides.mk
index 871e5b1..bf81dfc 100644
--- a/tasks/slides.mk
+++ b/tasks/slides.mk
@@ -16,6 +16,7 @@ watch-slides-internal: .marp/theme.css
 		 --theme $$(pwd)/.marp/theme.css \
 		 -w $(SLIDES_DIR) \
 		 -s
+	 # --theme-set glenux
 
 .PHONY: watch-slides serve-slides
 watch-slides: ## run development server for PDF slides