- Text content
- The string drawn on each frame. Newlines are honored, so a caption can span multiple lines. The 100-character limit keeps overlays readable without clipping at the edges.
- Font / Size
- Picks the typeface and pixel size used in the burned video. A 48 px headline reads cleanly at 1080p; bump up for 4K or down for vertical short-form.
- Bold / Italic / Underline
- Standard styling. Bold helps overlays survive busy backgrounds, italic suits attribution lines, and underline emphasises calls to action without shouting.
- Alignment
- Controls how multi-line text aligns relative to the anchor column. The position grid still decides where the block sits; alignment only affects internal line layout.
- Text Color / Background / Opacity
- Set the foreground glyph color and the optional pill behind the caption. The background opacity slider goes from invisible (0%) to fully solid (100%) so the same control covers contrast pads and translucent label chips.
- Image overlay
- Use a transparent PNG to keep clean edges. SVGs work too, but the rasteriser samples them at the chosen Size percentage of the video width.
- Position grid + Offset X/Y
- The 3 by 3 grid picks the anchor edge or corner. Offsets are expressed as a percentage of the video width or height, so a 4% bottom-right offset behaves the same on a 720p phone clip and a 4K camera master.
- Size
- Width of an image overlay relative to the video width. Text overlays use Font Size instead, so this slider only appears in image mode.
- Opacity / Rotate
- Opacity dims the entire overlay, useful for soft watermarks. Rotate spins the overlay around its centre, handy for diagonal promo banners.
- Time Range
- Limits when the overlay appears. Leave both fields blank to cover the whole clip; set just the start to delay an entrance, or just the end to ramp out before the closing seconds.