Help:

• Focus on the left pane (Create menu).
• Select an object from drop-down menu, a sphere, a cone, or a cylinder.
• Set object's color from "Object color" color-picker on the right pane. (Color-picker is TinyColor by Brian Grinstead.)
• Set size (scale) of object. In 3D: X, Y and Z scales.
• Set position (translate) of object. Z translation can be set via slider. X and Y translation is set automatically when mouse-clicking on canvas.
• Set orientation (rotate) of object. In 3D: X, Y and Z rotations. This is object's rotation, not world rotation, not camera rotation.
• Click on canvas to place the chosen object.
• Placed object can then be canceled by clicking "Undo" button

• Focus on the right pane (Select & Modify menu).
• In the table, select an object to be selected, by clicking on the radio-button. Scroll up/down the table if necessary.
• After selecting the object, it can be deleted, or to be modified.
• To delete the selected object, click on "Delete selected object" button.
• To modify the selected object, slide the sliders: scale, translate, rotate.

• Lighting checkbox is used to turn on/off the light.
• The light is single directional and basic ambient with object's diffuse color.

• Objects can be rendered in solid shapes, or in wireframes (meshes), or both.

• Click "Clear canvas" button to delete all objects on canvas.

• Click "Save image" button to save / download current canvas' image.

• Click "Save to JSON file" button to save current canvas' objects data to a JSON text file. The saved JSON file can then be uploaded back by using "Load JSON file" button.