Placing a 3D mannequin
The 3D materials are nestled within the Material>3D tab. It’s fairly intuitive. To place a figure on the canvas, simply select the pose you want and drag and drop it on to your drawing canvas. It creates a special 3D layer that you can edit as well as lower its Opacity (so that you can use it as a guideline).
Under Angle>Preset, you can toggle isometric views and other presets. Toggling Manga Perspective exaggerates foreshortening. Adjust the body proportions in detail here. Go from left to right (from broad changes to tiny ones).