Modifying QGCS Doubt

Hello, I’m trying to make a custom version of the QGCS software. I am trying to resize the map on the main window. Where in the source code should I look? I’m using Qt Creator to edit the code.

Doesn’t the documentation for QGC mention inability to use QT Creator?
https://dev.qgroundcontrol.com/master/en/ui_design/

Note: Due to the complexity of the QML used in QGC as well as it’s reliance on communication with C++ objects to drive the ui it is not possible to use the QML Designer provided by Qt to edit QML.

Hi, I’m not using Qt design studio, it’s probably too complex for it. I’m directly editing the source code in qt creator. All the tutorials i saw online or the other custom builds on github use it this way.