Hi ​@S2319 

No native feature to dynamically switch between detailed and high-level timeline views. 

• Specifically, it's not possible to toggle between epics and stories by hiding or showing cards based on tags or filters. 
• The tagging functionality within timelines has limitations, and conditional formatting doesn't support toggling the visibility of elements, making it difficult to achieve this level of dynamic viewing.

To learn More - 

How do I add tags to Lucid cards when they are in timeline | Community

Show/Hide objects with Conditional Formatting in Lucidchart | Community

Hope this helps - Happy to help further!!
Thank you very much and have a great one!
Warm regards

Hi ​@S2319, thanks for your post! Unfortunately, this isn’t currently supported in Lucid, but we’re very interested in your feedback and committed to continually improving our products. If you’re willing to share, we’d love to hear more details about your use case or what you’d like to see in this experience within this thread. I’ve also converted this post to an idea so that it’s visible to others within the Product Feedback section of the community - from here, they can upvote it and add details of their own.

Finally, for more information on how Lucid manages feedback via this community, take a look at this post:

Thank you for sharing your ideas and feedback in the community. Please let us know if you have any questions!