zoom

Hello, I’m sorry for my English, but I’m French and I use google translation to explain my problem.
I have installed Wp gpx maps, but I wish when I zoom in that the map stays freeze on my zoom and does not return to its original state. Is there a line of code to modify for this please? I looked in different discussions (in English) but I have not found a discussion on it, thank you in advance for your answer but also for this plugin is great. See you soon. Eddy. ; )