diff --git a/crates/ui-egui/src/dialogs/command.rs b/crates/ui-egui/src/dialogs/command.rs
index 7b283c6ca..59309c5e9 100644
--- a/crates/ui-egui/src/dialogs/command.rs
+++ b/crates/ui-egui/src/dialogs/command.rs
@@ -1,6 +1,8 @@
 //! The generic parameter dialog (`ui.paramDialog`): edits a command's parameters (`__command`,
 //! headed `__label`) and runs it on OK, with the fixed ones in `__params` (not shown) added.
 
+use std::sync::LazyLock;
+
 use serde_json::Value;
 
 use super::{DialogSpec, form};
@@ -40,6 +42,7 @@ fn choices(command: &str, key: &str) -> Option<form::Choices> {
         ("text.areaOptions", "fit") => Some(AREA_FIT),
         ("text.areaOptions", "firstBaseline") => Some(FIRST_BASELINE),
         ("text.areaOptions", "verticalAlign") => Some(VERTICAL_ALIGN),
+        ("graph.setType", "type") => Some(GRAPH_KINDS.as_slice()),
         ("graph.setType", "valueAxis") => Some(GRAPH_VALUE_AXIS),
         ("graph.setType", "tickLength" | "rightTickLength" | "categoryTickLength") => Some(GRAPH_TICK_LENGTH),
         ("graph.setType", "pieLegend") => Some(PIE_LEGEND),
@@ -62,6 +65,10 @@ const FIRST_BASELINE: form::Choices =
 /// Area Type Options › Align (vertical alignment of the lines in each row/column).
 const VERTICAL_ALIGN: form::Choices = &[("Top", "top"), ("Center", "center"), ("Bottom", "bottom"), ("Justify", "justify")];
 
+/// Graph Type › Type: the nine graph kinds, in the Graph tool group's order.
+static GRAPH_KINDS: LazyLock<Vec<(&'static str, &'static str)>> =
+    LazyLock::new(|| vectorcraft_doc::GraphKind::ALL.iter().map(|k| (k.label(), k.id())).collect());
+
 /// Graph Type › Value Axis (series picked on both axes show none, and OK leaves each where it is).
 const GRAPH_VALUE_AXIS: form::Choices = &[("On Left Side", "left"), ("On Right Side", "right"), ("On Both Sides", "both")];
 
@@ -146,4 +153,23 @@ mod tests {
         crate::dialogs::confirm(&mut app).unwrap();
         assert_eq!(app.session.execute("graph.setType", &json!({})).unwrap()["valueAxis"], "both");
     }
+
+    /// Graph Type › Type is a dropdown of the nine graph kinds (#2175), and OK changes the graph's
+    /// type and keeps its data.
+    #[test]
+    fn graph_type_is_a_dropdown_of_the_graph_kinds() {
+        let kinds: Vec<(&str, &str)> = vectorcraft_doc::GraphKind::ALL.iter().map(|k| (k.label(), k.id())).collect();
+        assert_eq!(choices("graph.setType", "type").unwrap().to_vec(), kinds);
+        let mut app = VectorcraftApp::new(Session::new(), Default::default());
+        app.run("file.new", json!({"width": 400, "height": 400})).unwrap();
+        app.run("graph.create", json!({"type": "column", "x": 0, "y": 0, "width": 200, "height": 150, "csv": ",a,b\nQ1,1,2\nQ2,3,4"})).unwrap();
+        let data = app.session.execute("graph.setData", &json!({})).unwrap();
+        assert_eq!(data["rows"], json!([[1.0, 2.0], [3.0, 4.0]]));
+        crate::menus::graph_dialog(&mut app, "graph.setType").unwrap();
+        assert_eq!(app.ui.dialog.as_ref().unwrap().str("type"), "column");
+        app.ui.dialog.as_mut().unwrap().fields.insert("type".into(), json!("stackedBar"));
+        crate::dialogs::confirm(&mut app).unwrap();
+        assert_eq!(app.session.execute("graph.setType", &json!({})).unwrap()["type"], "stackedBar");
+        assert_eq!(app.session.execute("graph.setData", &json!({})).unwrap(), data);
+    }
 }