For the new version of Zubtitle, use the following directions:
In the caption editor screen, go to Text Styles:
From this settings tab, you can change the following settings for the captions:
Padding around the caption box
Caption outline color
Use the directions below for the old version of Zubtitle:
When using Zubtitle to automatically add captions to your videos, you can also customize the look, format, & style of the caption text.
After uploading a video and allowing the automatic transcript to generate, look for the "Add New Style" button within the Select A Style menu:
When creating a new style, you can customize the font, color, font size, padding, and more:
Click save and your new style will be added to your available selections.