title: How to view Gtag recommended parameters in Google Analytics?
body: <p>I am using the gtag.js library in my website and view the result in google analytics. I have implemented the <code>purchase</code> event as follows:</p>
  
  <pre><code>trackPurchase({ checkoutResult, order, items }) {
    const gtagItems = items.map(item =&gt; orderItemToGAItem(item));
    this.gtag('event', 'purchase', {
      transaction_id: checkoutResult.transactionId,
      value: checkoutResult.amount,
      currency: checkoutResult.currency,
      shipping: order.shippingCost,
      itmes: gtagItems,
    });
  }
  </code></pre>
  
  <p>And the GA debugger in chrome prints the following in console when the event is triggered:</p>
  
  <pre><code>Running command: ga("gtag_UA_********.send", "event", {currencyCode: "HKD", forceSSL: true, &amp;gtm: "2oubc0", hitCallback: [function], eventCategory: "ecommerce", eventAction: "purchase", eventValue: 400})
  analytics_debug.js:23 
  Sent beacon:
  [ ****** ]
  
  
  analytics_debug.js:23 &lt;unknown&gt;        (&amp;gtm)  2oubc0
  analytics_debug.js:23 _j1              (&amp;jid)  
  analytics_debug.js:23 _j2              (&amp;gjid) 
  analytics_debug.js:23 adSenseId        (&amp;a)    317378694
  analytics_debug.js:23 apiVersion       (&amp;v)    1
  analytics_debug.js:23 clientId         (&amp;cid)  [ ****** ]
  analytics_debug.js:23 currencyCode     (&amp;cu)   HKD
  analytics_debug.js:23 ec:action        (&amp;pa)   purchase
  analytics_debug.js:23 ec:id            (&amp;ti)   [ ****** ]
  analytics_debug.js:23 ec:revenue       (&amp;tr)   400
  analytics_debug.js:23 ec:shipping      (&amp;ts)   20
  analytics_debug.js:23 encoding         (&amp;de)   UTF-8
  analytics_debug.js:23 eventAction      (&amp;ea)   purchase
  analytics_debug.js:23 eventCategory    (&amp;ec)   ecommerce
  analytics_debug.js:23 eventValue       (&amp;ev)   400
  analytics_debug.js:23 hitType          (&amp;t)    event
  analytics_debug.js:23 javaEnabled      (&amp;je)   0
  analytics_debug.js:23 language         (&amp;ul)   en-us
  analytics_debug.js:23 location         (&amp;dl)   [ ****** ]
  analytics_debug.js:23 screenColors     (&amp;sd)   24-bit
  analytics_debug.js:23 screenResolution (&amp;sr)   2560x1440
  analytics_debug.js:23 title            (&amp;dt)   OrderInfo
  analytics_debug.js:23 trackingId       (&amp;tid)  [ ****** ]
  analytics_debug.js:23 viewportSize     (&amp;vp)   1643x928
  </code></pre>
  
  <p>I can see the event <code>purchase</code> in google analytics console, however, there is no <code>label</code> and I cannot find any of <code>shipping</code>, <code>value</code>, <code>currency</code>, <code>transaction_id</code> and <code>item</code>.  How can I filter events by those value or view them?</p>
  
  <p>Thanks in advance.</p>