Choose the node you want to change => Go to the toolbar => Select the "Connection Style" section => You will see various connection styles, Choose the one you want =>
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Choose the node you want to change => Go to the toolbar => Select the "Connection Style" section => You will see various connection styles, Choose the one you want => In the same section, you can find the color option => Choose the color you want
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In the same section, you can find the color option => Choose the color you want.