Click on the Caption tab in Rocketium editor.
The first tab has options to customise positions and alignments.
To change the font, click on the Font drop-down menu and select the font that you like. You can upload your own fonts, if you're on the Expert plan!
To change the text size and styling, click on the Size drop-down and style the font as you like it.
You can set a custom size using the slider if you're on the Expert plan.
To change the text color, click on Color tab, click on Text Color, and choose a color from the palette or click on the ‘+’ icon to add a custom color.
To change the highlight color, click on Highlight Color and choose a color from the palette or click on the ‘+’ icon to add a custom color.
To change the background color, click on Background choose a color from the palette or click on the ‘+’ icon to add a custom color.
To add or change the border to you captions, click on More, and select the Border dropdown and choose a suitable border.
To adjust line spacing, click on Line Spacing and choose the value of the spacing which works the best for you.
To switch between paragraphs and lines having the background colors and patterns, click on Background Style.
In the preview window, you can switch between the captions using the selector tool at the top of the video. Click on the selector for different captions to preview that caption in the selected style.