Press green flag to start. The sprite will follow your mouse - move it to the start position you want. Press r to start recording. Move the sprite around with the mouse. Press e to end recording. While moving, press s to stamp an image of the sprite. Hold s to continually stamp. Press p to playback your movement and stamping.
Thanks to @warrior1785 for his tutorial found here: https://scratch.mit.edu/projects/376903068/