I wonder if there is the ability to print / export the schema builder?
If so, where can I find? If not, would be a great idea to implement this feature for future releases.
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Sign up to join this communityPrint/export from Schema Builder is not currently possible, but you can go vote on the idea for a future release.
There is, however, ERD Tool, a free app in the AppExchange that might work for you.
One of my first jobs was to print out the schema for the org i took over.
The only way I got the schema builder to "print" was to take screenshots and then place them together in MS Pain or Photoshop.
It looked so horrible I ditched it.
There is a tool out there called SchemaSpy that was able to give me printable ER Diagrams: http://blog.jeffdouglas.com/2010/05/12/running-the-force-metadata-jdbc-driver-for-schemaspy/
There is a product called Safyr that extracts metadata from SFDC and among other things, allows tables to be visualized as e-r diagrams, both within the product itself, and in a bunch of data modelling tools like ERwin, ER/Studio and PowerDesigner. You can also use Visio, as long as its 2010 or earlier (they took the data modelling capability out of Visio from 2013)
I think the only way to export/print your schema is to use an ERD tool. I recommend you try AbstraLinx, you will be able to export your schema as a PNG or print it directly.
Hope it helps you.
notice: I work for Softbuilder the company that develops this tool.