screen become become smaller

so my fg used to be full screen
but today when i open my fg it become smaller and the fg screen at the middle of screen. both side of screen having a blank space

Try reinstalling or deleting config.xml

but why?
it was full screen about 5 hour ago, i dont get how it turn like this ><

Someone had the same issue and I forgot the solution but do what Eduardo said > try deleting your config.xml file or re-installing FG.

Fixed ! Thank you !

Closed. Also for future records, it was probably your resolution that was the problem.