I came across a useful hack when trying to center an object (but didn’t want to use the unsafe markdown trick) using the new beta_columns:
import streamlit as st
import cv2
img = cv2.imread('photo.jpeg')
st.image(img, use_column_width=True, caption='Random image for sizing')
st.title("Off center :(")
col1, col2, col3 = st.beta_columns([1,1,1])
col2.title("Centered! :)")
col2.image(img, use_column_width=True)
The images are there to help see the placement in the sea of white space. Hope it helps someone out there!