Hello thank you for posting in the Lucid community! Our sincere apologies for the delayed response on this thread--I wanted to follow up in case this answer may still be useful to you and to provide a solution for other users who see this thread in the future. 

Unfortunately it is not possible to rotate a group of objects in Lucidchart but thank you for your request. We're always looking for ways to improve Lucidchart and your feedback is the best way for us to keep developing a useful and effective product. I've submitted your idea to our product team on your behalf and it will be taken into consideration when prioritizing improvements. 

For anyone else with a similar request: we would love to hear additional detail about your use case see an example of what you're hoping to achieve or learn about a workaround you've discovered in the thread below. Thanks for your request!

I’d love the feature to be available: an automatic reorientation of a flowchart built manually with shapes and lines.

See this link: 

Hi ​@mwang, thank you for adding to this idea and sharing your feedback! The best way to show you would like this feature implemented is to upvote this post! 

We encourage anyone else who’s interested in this to upvote this post and share any additional details about your use case or what you’d like to see in this experience. For more information about how we manage feedback in this community, please take a look at this post:

I would love to have the rotate group function. I use  this for creating room layouts for events. A lot of times I need to rotate the group of objects to use the same layout on a different wall. When you have 50-100 objects, it is very tedious to move them all.

Thanks!

Hi ​@jeffnene, thank you for adding to this thread! I can certainly see why this is important to you. 

Just to clarify, are you using the Floor Plans share library found in Lucidchart? 

You should be able to rotate a group of these objects as shown below by selecting all the objects with your cursor, and rotating as desired. Is this what you are hoping to do in your document?