Hi Mark,
The form is conceptually divided into 3 columns.
The "Prompt" then the "Value" then the "Comment".
On the form, at either the Form level, tab level, or form-field level you can specify to "merge" these 3 columns into 1.
For example, If you add a Display field (for example a button) and you want it to be on the very left of the form, then you'd set this form field to "span".
Browses automatically "span" across all 3 columns.
Cheers
Bruce