diff --git a/plot/README.md b/plot/README.md
index 57567c2..b221710 100644
--- a/plot/README.md
+++ b/plot/README.md
@@ -35,7 +35,15 @@ visavis_plot.notify = ( msg ) => alert( msg )
 
 **`json_request( next?: string ) : string`**
 
-Request url to get JSON (plot data)
+Request URL to get JSON (plot data)
+
+**`json_cmp_request( next?: string | null ) : string | null`**
+
+Second request URL to get JSON for comparison (matrix, cube and discovery plots)
+
+**`multi_requests( next?: string[] ) : string[]`**
+
+Multiple request URLs to get JSON for comparison (matrix and cube plots)
 
 **`notify( msg: string ) : void`**
 
diff --git a/plot/plot.view.tree b/plot/plot.view.tree
index d6a23c3..cc8013b 100644
--- a/plot/plot.view.tree
+++ b/plot/plot.view.tree
@@ -7,7 +7,7 @@ $mpds_visavis_plot $mol_view
 	json null
 	json_cmp_request? null
 	json_cmp null
-	multi_requests? /
+	multi_requests? /string
 	multi_jsons null
 	plot_raw null
 	show_setup false