K KDX^2 Member Dec 2, 2020 #1 Hi, I am new to GMS2 and I face a issue. I try to use GML: show_message("Hello World!"); but it doesn't show in output window or appear in a pop-up window. My system is Windows 10 and the version of GMS2 I am using is 126.96.36.1996. This is the screenshot of the editor.