Answers.Body: <p>You can do this with an expression on the Opacity property:</p>
  
  <pre><code>fade = framesToTime(10);
  fadeIn = (time - inPoint) / fade;
  fadeOut = (outPoint - time) / fade;
  if (time &lt; inPoint + fade) { ease(fadeIn, 0, 1) * value }
  else if (time &gt; outPoint - fade) { ease(fadeOut, 0, 1) * value }
  else { value }
  </code></pre>
  
  <p>This expression will fade the layer from 0% to 100% Opacity across the first 10 frames, then fade from 100% to 0% on the last 10 frames of the layer. This is based on the layer's in and out points on the timeline.</p>
  
  <p>Full tutorial (starts at 3:08):</p>
  
  <p><div class="youtube-embed"><div>
                  <iframe width="640px" height="395px" src="https://www.youtube.com/embed/BOPfs49VfLE?start=188"></iframe>
              </div></div></p>
  
  <p>Hope this helps!</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-09-20T01:01:07.373Z
Answers.Text: objective and effective response
Answers.UserDisplayName: LCarvalho
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2018-04-08T08:44:18.317Z
Answers.LastActivityDate: 2018-04-08T08:44:18.317Z
Answers.UserDisplayName: Parker Young
Body: <p>Is there any shortcut where I can apply a 0% opacity at the beginning of the layer and 100% opacity after 10 frames after the beginning of the layer and can do the reverse as well?</p>
  
Tags: <after-effects>
Title: Opacity depending on the layer
UserDisplayName: LCarvalho
ThreadText: # Opacity depending on the layer
  
  (Asked by: username_0 on 2018-03-20)
  
  Is there any shortcut where I can apply a 0% opacity at the beginning of the layer and 100% opacity after 10 frames after the beginning of the layer and can do the reverse as well?
  
  **Tags:** after-effects
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-04-08. Score: 1 | Accepted answer
  
  You can do this with an expression on the Opacity property:
  
  ```
  fade = framesToTime(10);
  fadeIn = (time - inPoint) / fade;
  fadeOut = (outPoint - time) / fade;
  if (time < inPoint + fade) { ease(fadeIn, 0, 1) * value }
  else if (time > outPoint - fade) { ease(fadeOut, 0, 1) * value }
  else { value }
  
  ```
  
  This expression will fade the layer from 0% to 100% Opacity across the first 10 frames, then fade from 100% to 0% on the last 10 frames of the layer. This is based on the layer's in and out points on the timeline.
  
  Full tutorial (starts at 3:08):
  
  Hope this helps!
  
  > **Comments:**
  > **username_0**: objective and effective response  
  
  ---
  
  