Subtitle Edit

the subtitle editor :)

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ASSA Set Background

Add styled background boxes behind subtitle text using ASSA drawing commands.

Menu: ASSA tools → Generate background boxes...

How to Use

1. Load a video and subtitle file in ASSA format.
2. Go to ASSA tools → Generate background boxes… to open the background dialog.
3. Configure the background box style — shape, colors, padding, and outline.
4. Preview the result in the built-in video player.
5. Click OK to apply the background box to your subtitle.

Features

Box Styles

• Square corners: Rectangular background box.
• Rounded corners: Background box with configurable corner radius.
• Circle: Circular background shape.
• Spikes, Bubbles, Wave, Hexagon, Torn paper, Cloud, Torn paper (double), Starburst, Scroll: Additional decorative box shapes.

Padding

• Configure left, right, top, and bottom padding independently.

Colors

• Box color: Background fill color.
• Outline color: Border/outline color around the box.
• Shadow color: Shadow color.

Outline

• Adjustable outline width.

Fill Width

• Option to fill the full width of the video with configurable left and right margins.

Live Preview

• Built-in video player shows a real-time preview of the background effect.

Keyboard Shortcuts

Shortcut	Action
F1	Show help (default key, changeable)
Escape	Close dialog