OSD Sidekick
OSD Sidekick used to be a standalone Windows app used to access various OSD settings. Since the last time I used it, it transformed into a component of the Gigabyte Control Center. Meaning, in order to access it, you're now forced to install the GCC suite and upgrade it with the necessary components. I'm not a fan of that approach - many users are allergic to the likes of GCC, Armoury Crate and similar – but the old software was far from ideal, too, as the OSD Sidekick EXE included a sneaky RGB Fusion 2.0 installation, which was downright infuriating. Either way, the monitor must be connected to the PC via DisplayPort to get recognized within the OSD Sidekick module.
Once everything is installed and connected properly, the OSD Sidekick component will let you change input sources, adjust physical controls, alter picture profiles and image settings (brightness, contrast, black level, vibrancy, blue light filtering, gamma, color temperature, etc.), activate and change virtual crosshairs, and so on. Perhaps the most useful part of the module, one that's absent from the "regular" OSD, is the APP Info tab, where you can bind different picture profiles to apps. Select the desired profile, navigate to the app's EXE file, and that's that. If you're using specific, multiplayer-gaming-oriented profiles for certain games, you'll put the APP Link feature to good use.