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A more detailed description of drag and drop functionality is given below, but the following videos will introduce you to the basic concepts:
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Pinning and unpinning
A key concept behind dragging functionality in forms is pinning and unpinning. Unpinned components are placed into the next available space. Pinned components can be placed anywhere on the form, and you can pin the edges to the edges of the parent component by setting offsets between the top, right, bottom and left edges of the component to those of the parent.
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