diff --git a/pixstrip-gtk/src/app.rs b/pixstrip-gtk/src/app.rs
index 37eebe9..3cd5225 100644
--- a/pixstrip-gtk/src/app.rs
+++ b/pixstrip-gtk/src/app.rs
@@ -2047,40 +2047,128 @@ fn import_preset(window: &adw::ApplicationWindow, ui: &WizardUi) {
 }
 
 fn save_preset_dialog(window: &adw::ApplicationWindow, ui: &WizardUi) {
-    let dialog = adw::AlertDialog::builder()
-        .heading("Save as Preset")
-        .body("Enter a name for this workflow preset")
+    let dialog = adw::Dialog::builder()
+        .title("Save as Preset")
+        .content_width(400)
+        .content_height(500)
         .build();
 
-    let entry = gtk::Entry::builder()
-        .placeholder_text("My Workflow")
+    let toolbar = adw::ToolbarView::new();
+    let header = adw::HeaderBar::new();
+    toolbar.add_top_bar(&header);
+
+    let scrolled = gtk::ScrolledWindow::builder()
+        .hscrollbar_policy(gtk::PolicyType::Never)
+        .vexpand(true)
+        .build();
+
+    let content = gtk::Box::builder()
+        .orientation(gtk::Orientation::Vertical)
+        .spacing(12)
+        .margin_top(12)
+        .margin_bottom(12)
         .margin_start(24)
         .margin_end(24)
         .build();
-    dialog.set_extra_child(Some(&entry));
 
-    dialog.add_response("cancel", "Cancel");
-    dialog.add_response("save", "Save");
-    dialog.set_response_appearance("save", adw::ResponseAppearance::Suggested);
-    dialog.set_default_response(Some("save"));
+    // Show summary of current settings
+    let cfg = ui.state.job_config.borrow();
+    let summary = build_preset_description(&cfg);
+    drop(cfg);
 
-    let ui = ui.clone();
-    dialog.connect_response(None, move |dlg, response| {
-        if response == "save" {
-            let extra = dlg.extra_child();
-            let name = extra
-                .as_ref()
-                .and_then(|w| w.downcast_ref::<gtk::Entry>())
-                .map(|e| e.text().to_string())
-                .unwrap_or_default();
+    let summary_group = adw::PreferencesGroup::builder()
+        .title("Workflow Summary")
+        .description(&summary)
+        .build();
+    content.append(&summary_group);
 
+    // Name entry
+    let name_group = adw::PreferencesGroup::builder()
+        .title("Save as New Preset")
+        .build();
+
+    let name_entry = adw::EntryRow::builder()
+        .title("Preset Name")
+        .build();
+    name_group.add(&name_entry);
+
+    let save_new_button = gtk::Button::builder()
+        .label("Save New Preset")
+        .halign(gtk::Align::Center)
+        .margin_top(8)
+        .build();
+    save_new_button.add_css_class("suggested-action");
+    save_new_button.add_css_class("pill");
+
+    content.append(&name_group);
+    content.append(&save_new_button);
+
+    // "Update existing" section - show user presets
+    let store = pixstrip_core::storage::PresetStore::new();
+    let user_presets: Vec<String> = store
+        .list()
+        .unwrap_or_default()
+        .into_iter()
+        .filter(|p| p.is_custom)
+        .map(|p| p.name)
+        .collect();
+
+    if !user_presets.is_empty() {
+        let update_group = adw::PreferencesGroup::builder()
+            .title("Or Update Existing Preset")
+            .description("Overwrite an existing user preset with current settings")
+            .build();
+
+        for preset_name in &user_presets {
+            let row = adw::ActionRow::builder()
+                .title(preset_name)
+                .activatable(true)
+                .build();
+            row.add_prefix(&gtk::Image::from_icon_name("document-save-symbolic"));
+            row.add_suffix(&gtk::Image::from_icon_name("go-next-symbolic"));
+
+            let ui_c = ui.clone();
+            let dlg_c = dialog.clone();
+            let pname = preset_name.clone();
+            row.connect_activated(move |_| {
+                let cfg = ui_c.state.job_config.borrow();
+                let preset = build_preset_from_config(&cfg, &pname);
+                drop(cfg);
+
+                let store = pixstrip_core::storage::PresetStore::new();
+                match store.save(&preset) {
+                    Ok(()) => {
+                        let toast = adw::Toast::new(&format!("Updated preset: {}", pname));
+                        ui_c.toast_overlay.add_toast(toast);
+                    }
+                    Err(e) => {
+                        let toast = adw::Toast::new(&format!("Failed to update: {}", e));
+                        ui_c.toast_overlay.add_toast(toast);
+                    }
+                }
+                dlg_c.close();
+            });
+
+            update_group.add(&row);
+        }
+
+        content.append(&update_group);
+    }
+
+    // Wire save new button
+    {
+        let ui_c = ui.clone();
+        let dlg_c = dialog.clone();
+        let entry_c = name_entry.clone();
+        save_new_button.connect_clicked(move |_| {
+            let name = entry_c.text().to_string();
             if name.trim().is_empty() {
                 let toast = adw::Toast::new("Please enter a name for the preset");
-                ui.toast_overlay.add_toast(toast);
+                ui_c.toast_overlay.add_toast(toast);
                 return;
             }
 
-            let cfg = ui.state.job_config.borrow();
+            let cfg = ui_c.state.job_config.borrow();
             let preset = build_preset_from_config(&cfg, &name);
             drop(cfg);
 
@@ -2088,15 +2176,20 @@ fn save_preset_dialog(window: &adw::ApplicationWindow, ui: &WizardUi) {
             match store.save(&preset) {
                 Ok(()) => {
                     let toast = adw::Toast::new(&format!("Saved preset: {}", name));
-                    ui.toast_overlay.add_toast(toast);
+                    ui_c.toast_overlay.add_toast(toast);
                 }
                 Err(e) => {
                     let toast = adw::Toast::new(&format!("Failed to save: {}", e));
-                    ui.toast_overlay.add_toast(toast);
+                    ui_c.toast_overlay.add_toast(toast);
                 }
             }
-        }
-    });
+            dlg_c.close();
+        });
+    }
+
+    scrolled.set_child(Some(&content));
+    toolbar.set_content(Some(&scrolled));
+    dialog.set_child(Some(&toolbar));
 
     dialog.present(Some(window));
 }