Make a dynamic text box in After Effects
In this tutorial, we create a responsive box behind text using just the text layer itself. No shape layers are needed. Perfect for quick and easy social media caption overlays.
Step 1: Add a Generate / Fill effect and choose your box color.
Step 2: Add a Channel / Shift Channels effect. Change Take Alpha From to 'Full On'.
Step 3: Add a Stylize / CC RepeTile effect. Change all values to 40.
Step 4: Add a Channel / CC Composite effect.
Step 5: For rounded corners add two Matte / Simple Choker effects. Use values of 15, and negative 15.
The box will automatically resize and move as you edit and position your text. Neat!
Tip: You can use expression sliders for the CC RepeTile and Simple Choker values, which will control the box 'padding' and 'roundness' respectively. Remember to make the second Simple Choker value a negative value of the first.
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