Xcode 7 - same file opened in different tabs

Question

I am angry about the behavior of xcode by opening the same file several times.

For example, if I opened api.h and main.m. api.h # is included in main.m. When I make a "transition to the definition" of a variable created in main.m that is declared in api.h - xcode opens api.h in a new tab.

So api.h opens twice at a time in the same window. How can I change the behavior so that it goes to the tab where it is already open (when I go to the definition from main.m)?