Thanks for answers!at makescreenshot-api-example.xml: I tried to do so onclick="makescreenshot(0,0,true,jpg,0.85,{x: 100, y: 100, w: 400, h: 300 },);" But it saves a snapshot of the entire screen.
A, 53 lines - tried so var screenshotcanvas = krpano.webGL.makeScreenshot(0, 0, true, "canvas", 0, {x:200, y:300, w:500, h:500 }, sizeinfo, krpano.makeScreenshotCache); This oddly saves the image size 155x155