http://blogs.msdn.com/mailant/archive/2005/03/24/401566.aspxThe shapes that you see on the stencil on the left pane of Visio are called “masters.” Think of a master as an object. When you drag a master from the stencil, you are dropping an instance of that master object onto the page. That instance, which we callen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.msdn.com/mailant/archive/2005/03/24/401566.aspx#402484Sat, 26 Mar 2005 10:40:00 GMT91d46819-8472-40ad-a661-2c78acb4018c:402484MichaelMai-lan, <br>let's say I have a stencil with master A and a drawing that has 3 instances of master A in it. <br>If I want to add an additional custom property to Master A and it's instances in the drawing, I could open the Master, add the property, Close the Master and the 3 instances in the drawing will get the property automatically? <br> <br>What happens if this stencil is used in other drawings as well, will they get updated as well? <br> <br>Up until now I have manually added custom properties and then ran some code on all drawings to update the individual impacted shapes. <br> <br>if what I am doing is not neccessary I would love to see a working sample!