I would like to add text on top of the rectangles to specify the entity names. How do I do this in draw.io? Not inside the elements but on top of them.Something like Employee/Secretary as shown in the picture below. 
Draw.io – Define Entity for Relational Schema
draw.iotext;
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Best Answer
You can simply put a text stencil (the 4th stencil in the "General" group) where you need the additional text. No need to paste from anywhere.