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Gadgets cannot be placed outside of the dashboard's white canvas area.  If more space is needed at the bottom of the dashboard, the canvas can be resized by clicking and dragging the gray resize bar that appears while in Edit Mode. The canvas will snap to efficiently fit the new gadget layout when Edit Mode is turned off.

Move and Resize The Gadgets

Resizing Gadgets

Gadgets can be resized to any dimensions as long as they fit within the confines of the dashboard itself.

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