diff --git a/src/components/graph.ts b/src/components/graph.ts
index 849ffbc..0b0558b 100644
--- a/src/components/graph.ts
+++ b/src/components/graph.ts
@@ -976,7 +976,7 @@ export class Graph {
     }
 
     const ret = await dialog.showSaveDialog({
-      defaultPath: workspace.workdir,
+      defaultPath: workspace.workdir.replaceAll("/", Path.sep),
       properties: ["showOverwriteConfirmation"],
       filters: [{ name: "Json", extensions: ["json"] }],
     });
diff --git a/src/components/menu.tsx b/src/components/menu.tsx
index 1d7386b..eaf91b4 100644
--- a/src/components/menu.tsx
+++ b/src/components/menu.tsx
@@ -14,6 +14,7 @@ import { useWorkspace } from "../contexts/workspace-context";
 import * as b3util from "../misc/b3util";
 import i18n from "../misc/i18n";
 import { Hotkey, isMacos } from "../misc/keys";
+import Path from "../misc/path";
 
 const MenuItemLabel: FC<FlexProps> = (itemProps) => {
   return (
@@ -107,6 +108,7 @@ export const Menu: FC<LayoutProps> = () => {
             click: () => {
               console.log("newFile");
               const path = dialog.showSaveDialogSync({
+                defaultPath: workspace.workdir.replaceAll("/", Path.sep),
                 properties: ["showOverwriteConfirmation"],
                 filters: [{ name: "Json", extensions: ["json"] }],
               });
diff --git a/src/components/register-node.ts b/src/components/register-node.ts
index 1fc22ae..2a0dd0b 100644
--- a/src/components/register-node.ts
+++ b/src/components/register-node.ts
@@ -189,8 +189,8 @@ b3util.setSizeCalculator((data: NodeData) => {
     height += 20;
   }
   updateHeight(data.args);
-  updateHeight(data.input);
-  updateHeight(data.output);
+  data.input?.find((v) => !!v) && updateHeight(data.input);
+  data.output?.find((v) => !!v) && updateHeight(data.output);
   return [width, height];
 });
 
@@ -513,7 +513,7 @@ class TreeNode extends Rect {
   }
 
   private drawInputText(attributes: Required<RectStyleProps>, container: Group) {
-    const input = this._data.input ?? [];
+    const input = this._data.input?.find((v) => !!v) ? this._data.input : [];
     const { str, line } =
       input.length > 0
         ? toBreakWord(`${i18n.t("regnode.input")}${JSON.stringify(input)}`, 200)
@@ -552,7 +552,7 @@ class TreeNode extends Rect {
   }
 
   private drawOutputText(attributes: Required<RectStyleProps>, container: Group) {
-    const output = this._data.output ?? [];
+    const output = this._data.output?.find((v) => !!v) ? this._data.output : [];
     const { str, line } =
       output.length > 0
         ? toBreakWord(`${i18n.t("regnode.output")}${JSON.stringify(output)}`, 200)