Can I regenerate .designer.cs based on a manually edited .dbml?

I've made some modifications (renamings mostly) in a DBML file manually (using a text editor). Can I use VisualStudio to recreate the .designer.cs file based on new DBML?

How do I add a stored procedure to an existing Dbml?

To add stored procedures to the O/R Designer dbml file that you added earlier. Click the Sales by Year stored procedure and drag it to the right pane of the designer. Click the Ten Most Expensive Products stored procedure drag it to the right pane of the designer. Save your changes and close the designer.

How do I update Dbml in Visual Studio 2013?

Right click on your file in solution explorer and select Run custom tools and see if it is getting updated.

Right click on your dbml file and select "Run Custom Tool"