OK, to get rid of the key image, it is easiest to make it non-visible. It will still be there but that won't matter if it is set to be hidden. That way you will have the option to make it visible again if you change your mind.

To do that, you need to decide what you are going to change. You could change one instance but it would make more sense to change either the instance in the document stencil or in the stencil you chose it from in the first place. Let's make the assumption you are changing the instance in the document stencil - this will change all the instances already in your document.

In the stencils list go to More Shapes > Document Stencil.
Right click on the shape called Primary Key Attribute and choose Edit Master > Edit Master Shape. This opens a new window with the key symbol beside a PK and attribute name.
Click on the key shape twice so the selection handles ONLY show the key shape selected. Then right click it and choose Show Shapesheet
Find the Geometry 1 section and the field called Geometry1.NoShow. Change its value to =True
Close the shapesheet
Close the Primary Key Attribute window - You will be asked if you want to update the shape and all of its instances - click Yes.

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Andrew Lockton
Chrysalis Design, Melbourne Australia