When upgrading to OPM v9101 from v9011 and creating business view, I find that there were some question on Map Maker: 1、It's very slow to open a business view; 2、What the default size of background is? I want to upload some custom pictures as background and it's hard to fit the screen; 3、If I add a shortcut and create a link between the shortcut and core devices, the background will disappear after saving the above action. And We have managed 300 devices and will expand to 1000, I need this way to make our business view clear that the different shortcuts represent different area and they link different core devices. 4、Sometimes I can't click the browsing icon of custom device's icon. Even if I upload an icon from my PC, the device's icon still can't be shown.