Box It adds a shape layer box beneath a text layer in After Effects, fitting the text precisely and updating automatically whenever the text changes. It works with paragraph text, vertical text (with Full Height), and in 3D. Applying it to a text layer adds effect controls to the text and creates a shape box with its own controls, so you can adjust several boxes individually or drive them all at once from the text layer.
Corner handling covers each individual corner, four profiles (convex, concave, flat, and step), and adjustable curvature for a squircle look, with the corner radius set in pixels or percent. Alignment options anchor boxes to the composition on the x and y axes with x, y, z position offsets, or to a parent layer across 25 positions, updating as the composition or text changes.
Additional controls include expansion, roundness, skew, minimum width and height, and matching a chosen layer's width or height. You can animate text separately from the box, push text just outside it for track mattes, and choose when the box reads the text to size itself: Current Time, Layer In, Mid, or Out Point, or a Custom Time.