A sewing machine includes a position acquisition device, a projection device, a processor, and a memory. The position acquisition device is configured to acquire information describing at least one designated position, each of the at least one designated position being a position on a sewing workpiece. The projection device is configured to project an image onto the sewing workpiece. The memory is configured to store non-transitory computer-readable instructions that instruct the processor to execute a step that includes specifying the at least one designated position on the sewing workpiece described by the information acquired by the position acquisition device. The memory is also configured to store non-transitory computer-readable instructions that instruct the processor to execute a step that includes causing the projection device to project a visually recognizable marker onto the sewing workpiece, based on the specified at least one designated position.