Trims top and bottom from the input bounding box so you can remove letterbox bars without touching the left and right edges.
Letterbox Trim adjusts the input’s bounding box by cutting in from the top and bottom. Left and right stay locked to the incoming bbox; only vertical margins change.
Use it when letterboxed plates or renders carry black bars you want out of the format before framing, transforms, or downstream crops. Top and Bottom control how many pixels are removed from each edge.
A Crop runs with crop disabled, so the node redefines the data window from the input bbox rather than painting outside black. Defaults trim one pixel top and bottom; raise the knobs to match the bar height in your plate.