You can use CSS Ready Classes to float fields side by side. This can be used to float your checkbox field to the right of your email field. There are a bunch of CSS Ready Classes, which are pre-defined CSS classes you can apply to fields to implement enhanced layouts without having to write your own CSS.
All of the available CSS Ready Classes are documented here:
Currently conditional logic can only be triggered by a drop down, radio button or checkbox field where a user selection is made. So while you can show or hide a text input field based on the value of a selection field, you can't currently show or hide another field based on a text input value. It is a feature we would like to add in the future.
Posted 9 years ago on Thursday December 1, 2011 | Permalink