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UML Diagram Maker is a powerful yet easy-to-use UML diagram drawing program. To create a UML diagram, you can either start from a blank page or from a ready-made template. The built-in symbol stencils will open automatically every time you start a new drawing. The Home menu provides quick buttons to add text boxes, to draw dynamic connectors, and to align and distribute your drawing. Many quick styles and theme options help you design a personalized UML diagram with the best look you like.