Hi Rich
Thank you for reaching out. We do offer vertical and horizontal guide functionality. By right-clicking on your document you can select either a vertical or horizontal guide.

After inserting these guides confirm that your "Snap to Guide" setting is turned on (on the far right of the Page Settings options). Your objects should snap easily to this guide.

Please let me know if you have any other questions!
Still no "Select Guide Center to Guide" function? This is 2.5 years later and it still has not been implemented?
Snap to Guide doesn't actually work for this because if you cannot select a guide to which you want to align a set of selected objects then you cannot align them on Guide centers.
This still requires a multistep operation to 1) pull out the guide 2a) select 2b) align 2c) group a set of objects then 3) move to center onto a Guide.
Visio and Concept Draw still does this better.
Put this on your endless list of missing functions to add.
Hi Rich thanks for following up on this! If you would like to see the guide feature expanded upon would you mind adding your idea to our feature request form? The best way to communicate the importance of this to the product team is to add it to the product feedback section as the demand for certain features factors into the product team's decisions.
Thanks for your request and I apologize for any inconvenience this causes you.
I just noticed that this comment was 4 years ago. i just started using this program and you still can’t simply click an object and select “Center on Page”. That’s rudimentary and I’m shocked that you can’t do that. That’s the one function I use the most.
Hi @GGatFTC, thank you for continuing this post. Unfortunately, this isn’t currently supported in Lucid, but we’re very interested in your feedback and committed to continually improving our products. Please first search the Product Feedback section of this community (with the filter Topic Type = Idea) to see if it’s already been submitted. If so, please add any additional details you’d like and upvote the request - this consolidation helps to refine feedback and properly capture the popularity of the request.
If no one has submitted this idea yet, please create one of your own and be sure to include details about your use case or what you’d like to see in this experience. This will also allow other users with similar requests to discover and upvote it, then 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.