I aim to utilize the Ndisplay system to establish a multi-screen display setup comprising three computers: one serving as the server and the other two as clients. Each of these computers will oversee the control of a distinct projected screen. These screens are used for video projection and necessitate recalibration while the simulation application is in progress. What is the optimal method for developing a widget to facilitate this task, allowing the operator to apply screen calibration without relying on the Unreal Engine editor and the need to re-export the project?