Choose the look before anything is made
Pick a built-in style or set the text, spoken-word highlight, outline, panel, size and screen position yourself. A preview shows the result before the caption pass runs, so you are not rendering a full video to find out the outline is too thin.
Um Out renders the reviewed words into transparent visual assets and places them as timed clips on their own track. That keeps the visible pixels the same across Premiere installations instead of depending on an installed text template that a collaborator may not have.