outlook 365 WILL NOT display messages one line!

[Jerry1221]

I have changed all of the appropriate settings but 365 will not display one line! is this a bug?

[#2]

@Jerry1221 
We don't have any such reported bug yet, but can you confirm you have checked the following setting in Outlook to enable Message Preview:

[#3]

@surajbudhani 

Yes I have.