The window to make visible.
Errors: Possible errors include @ref GLFW_NOT_INITIALIZED and @ref GLFW_PLATFORM_ERROR.
This function must only be called from the main thread.
@sa @ref window_hide @sa @ref glfwHideWindow
Added in version 3.0.
Ingroup: window
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Makes the specified window visible.
This function makes the specified window visible if it was previously hidden. If the window is already visible or is in full screen mode, this function does nothing.
By default, windowed mode windows are focused when shown Set the GLFW_FOCUS_ON_SHOW window hint to change this behavior for all newly created windows, or change the behavior for an existing window with @ref glfwSetWindowAttrib.