Opening a block definition diagram (SysML)
1. In an appropriate pane, locate the Block Definition Diagram you want to open.
On the 
Blocks pane, all Block Definition Diagrams are listed in the BlockDefinitionDiagram folder.
Blocks pane, all Block Definition Diagrams are listed in the BlockDefinitionDiagram folder.2. Right-click the Block Definition Diagram you want to open, and then click Open.
Alternatively, double-click the Block Definition Diagram you want to open.