Do you put a onsie under your babys sleepers?

I never really have. I keep it warm in the house during the day and cooler at night for sleeping. I have a light muslin sleep sack for daytime naps a nightime one thats a bit warmer. I've had comments that she isn't wearing a onsie underneath her footed sleepers. FTM so I don't actually know what the norm is. When she was a newborn I didn't either but she always had a blanket. I dress her in layers to go out but not around the house. I do put them under dresses and shirt/pant outfits.