title: how to show the dropdown values to be shown only once in the list using powerapp
body: <p>I have a dropdown that shows me some categories and those categories in turn have a list of subcategories</p>
  <p>The problem I am having is that certain categories appear repeated, and <strong>I would like to know how I can show the categories, not repeated</strong></p>
  <ul>
  <li><strong>Category</strong></li>
  </ul>
  <p><a href="https://i.stack.imgur.com/YT1pT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/YT1pT.jpg" alt="enter image description here" /></a></p>
  <pre><code>Table1
  </code></pre>
  <ul>
  <li><strong>Sub Category</strong></li>
  </ul>
  <p><a href="https://i.stack.imgur.com/eAoc4.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eAoc4.jpg" alt="enter image description here" /></a></p>
  <pre><code>Filter(Table1; CATEGORIES = CategoriesDropdown.SelectedText.CATEGORIES)
  </code></pre>