No the GUI editor shows only one route at the time.
You can switch between the routes by clicking in the outline view, or from the Camel menu item, which lists all the routes.
Ok thanks, is there any scope to change / enhance this?
Not a current time.
In fact the older 1.x release used to have all routes in the same GUI. But that was cumbersome to layout this nicely, and some users got confused which route they were editing etc.
The runtime view (eg diagram view) can show 1 or all routes in the same view. But that requires you to attach Fuse IDE to a running JVM with Camel running inside to see those diagram in real time.