Vertical form
Use .mb- class with required size value (1 to 6) to set row height gap
Horizontal form
Use .col- class with required size value (1 to 12) to set label column size
Column sizing
Use .col- class with required size value (1 to 12) to set column size
Inline form
Use .col-auto to set form inline
Sizing inline form
Use .col-auto-sm or .col-auto-xl to set inline form