Vizard Agent

How to make your subtitles smaller without making them unreadable

Last updated 2026-10-10 · 2 min read

Ask Vizard Agent for smaller subtitles and say they still have to be readable: those are two instructions, not one. It picks a typeface that holds its shape at the smaller size, keeps the lines short so they don't wrap, and checks the result on rendered frames instead of a preview.

What do you type into Vizard Agent?

Put the constraint in the same sentence as the request. "Smaller" on its own invites a size that technically renders and can't be read on a phone, and the whole point is that people still read them. Say what the text must not cover too: that tells Vizard Agent to change the position as well as the size.

Prompt

Make the subtitles much smaller than they are now, but still readable on a phone. They should not cover the scenery in the drone shots. Also fix the spelling of the place name (it is Lytime Thanh Thuy, not resort) and keep the video the same length.

What does Vizard Agent actually do?

Caption presets are sized for a phone held at arm's length with the sound off, which is wrong for landscape footage where the picture is the point. The size is the easy part. The typeface and the line lengths are what make a smaller size work, so the size and the face are chosen together. In the session behind this article it:

When does this not work well?

Some footage can't take small captions at all. Over busy, bright or high-contrast pictures, small text needs an outline or a shadow to survive, and past a certain point the outline is doing the work the size was supposed to remove. Very low resolution leaves too few pixels, and stacked accents are the first thing to go.

Common questions

How small can subtitles go? Until they stop being readable on a phone. Vizard Agent checks that rather than guessing.

What if captions are already burnt in? Vizard Agent covers the old layer rather than leaving it visible behind the new text.

Will the accents survive? Yes, if the typeface is chosen for it. Vizard Agent treats that as part of the job.