I have the same question...

Go into edit mode, and when you see the option to add new layers, if you hover your mouse over the one(s) you want to delete you'll see three dots.  Click those dots and delete is an option.

Agree its not super intuitive to find.

@Mike_Buck I think that would be for deleting a page in an interface, not a layout.

I'm referring to the layouts that you assign to lookup items in a page, which open another drawer to see their details

Shockingly, Airtable has given us no way to delete record detail layouts. I would send an email to support@airtable.com and ask them to implement this ASAP.

I don't see any way to do this, but as a work-around, I rename the old record detail layouts as "delete1" "delete2", etc... so I know not to use them. Some day, I'll actually be able to delete them... someday. 

I'd also like to delete a Layout page @dashler78 

i agree, unfortunately, you can create new layout, but not possible to delete it. Will be great to have this feature one day to clean unused layouts (not linked).

I also need a way to delete layouts. We use a system to create Dev/Prod versions of our interface and this makes duplicates every time we deploy our changes, which we then cannot delete. 

Really struggling with this as well. I have one nested layout (I go into one and then deeper into another) and I initially chose a layout that is not the one I want. But there is no way to change to the one I do want once I go deeper into these nested relationships. I wrote to support as well so hopefully they will see the need for managing these layouts. 

@Noelle_Poulson That's the mian problem i've having too. In most circumstances, you can at least select the correct layout view you the link to use (even if there are lots of versions due to not yet being able to delete old ones). However, there are some links that don't give me the option to adjust, and they seem to default to one arbitrarily. 

I'll also contact support. This is actually a pretty big problem.