[Rider F# Code Style] How to keep code inline

Hi

When writing in F#, I'm expecting code to be in a single line as much as possible, for example :

type Person = {FirstName:string; LastName:string;}

But when reformat, it becomes

type Person = 
    { FirstName : string
      LastName : string }

I go through the settings in F# code style, but limited options are provided(right margins doesn't work) and I'm unable to find where to configure this.

Any suggestion is appreciated.