diff --git a/doc.json b/doc.json
index 6306c8d9..692ba029 100644
--- a/doc.json
+++ b/doc.json
@@ -1,11 +1,11 @@
 {
   "docs": [
     {
-      "comment": "/**\n * Intended for a debugging, drawLine renders the pattern as a string, where each character represents the same time span.\n * Should only be used with single characters as values, otherwise the character slots will be messed up.\n * Character legend: \n * \n * - \"|\" cycle separator\n * - \"-\" hold previous value\n * - \".\" silence\n *\n * @param {Pattern} pat pattern to use\n * @param {number} chars max number of characters (approximately)\n * @returns string\n * @example\n * const line = drawLine(\"0 [1 2 3]\", 10); // |0--123|0--123\n * console.log(line);\n */",
+      "comment": "/**\n * Intended for a debugging, drawLine renders the pattern as a string, where each character represents the same time span.\n * Should only be used with single characters as values, otherwise the character slots will be messed up.\n * Character legend:\n *\n * - \"|\" cycle separator\n * - \"-\" hold previous value\n * - \".\" silence\n *\n * @param {Pattern} pattern the pattern to use\n * @param {number} chars max number of characters (approximately)\n * @returns string\n * @example\n * const line = drawLine(\"0 [1 2 3]\", 10); // |0--123|0--123\n * console.log(line);\n */",
       "meta": {
         "range": [
-          1408,
-          2778
+          1414,
+          2784
         ],
         "filename": "drawLine.mjs",
         "lineno": 25,
@@ -44,8 +44,8 @@
               "Pattern"
             ]
           },
-          "description": "<p>pattern to use</p>",
-          "name": "pat"
+          "description": "<p>the pattern to use</p>",
+          "name": "pattern"
         },
         {
           "type": {
@@ -54,8 +54,7 @@
             ]
           },
           "description": "<p>max number of characters (approximately)</p>",
-          "name": "chars",
-          "defaultvalue": 60
+          "name": "chars"
         }
       ],
       "returns": [
diff --git a/packages/core/drawLine.mjs b/packages/core/drawLine.mjs
index 68c3be86..da424236 100644
--- a/packages/core/drawLine.mjs
+++ b/packages/core/drawLine.mjs
@@ -15,7 +15,7 @@ import Fraction, { gcd } from './fraction.mjs';
  * - "-" hold previous value
  * - "." silence
  *
- * @param {Pattern} pat pattern to use
+ * @param {Pattern} pattern the pattern to use
  * @param {number} chars max number of characters (approximately)
  * @returns string
  * @example
diff --git a/tutorial/ApiDoc.jsx b/tutorial/ApiDoc.jsx
index 1408f9ec..2d642ff1 100644
--- a/tutorial/ApiDoc.jsx
+++ b/tutorial/ApiDoc.jsx
@@ -3,7 +3,7 @@ import { docs } from '../doc.json';
 import { MiniRepl } from './MiniRepl';
 
 function ApiDoc() {
-  console.log('docJson', docs);
+  // console.log('docJson', docs);
   return (
     <div>
       {docs
@@ -23,6 +23,7 @@ function ApiDoc() {
                 }),
               }}
             />
+            <h3>Parameters</h3>
             <ul>
               {item.params?.map((param, i) => (
                 <li key={i}>
diff --git a/tutorial/package.json b/tutorial/package.json
index 5a524a84..0a5dd3d6 100644
--- a/tutorial/package.json
+++ b/tutorial/package.json
@@ -3,10 +3,11 @@
   "private": true,
   "version": "0.0.0",
   "scripts": {
-    "dev": "vite",
+    "dev": "npm run jsdoc-json && vite",
     "start": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
+    "build": "npm run jsdoc-json && vite build",
+    "preview": "vite preview",
+    "jsdoc-json": "jsdoc ../packages/ --template ../node_modules/jsdoc-json --destination ../doc.json -c ../jsdoc.config.json"
   },
   "type": "module",
   "dependencies": {