Always-on in Watch Face Studio
Always-on mode, also called ambient mode, is designed to display time and other information while using less battery life.
Because the always-on watch face uses less power, there are limits to how much of an always-on display surface can be used. Samsung recommends a design that uses no more than 15% of the available pixels in always-on states. If your watch face uses significantly more than 15% of available pixels, it can be rejected.
Watch Face Studio (WFS) automatically generates an always-on version of your watch face. You can use the generated version in your final product or modify it. Once you are happy with your always-on watch face, continue with the rest of your design by switching to normal mode.