Help with creating equations or global variables please!!! I am following examples and tutorials and "SW help" to try and create very simple equations or GVs in a simple sketch but it won't let me add them. Any ideas, it's very frustrating.  I have SW2015.

I double click on a dimension in a sketch, put and = and then a name and it prompts me to create a GV - I click yes but nothing happens.  I don't get symbol on the dimension and it doesn't appear in the equation manager (I can't add them in there either)

Any suggestions?