Each object you add has its own set of creation parameters, which define its geometry and other characteristics, depending on the type of object. Once placed in a scene, objects carry their creation parameters with them. You can change these parameters on the Modify panel.
You also use the Modify panel to assign modifiers. Modifiers are tools for reshaping an object. While they mold the final appearance of the object, modifiers do not change its underlying creation parameters.
You use the Modify panel to:
The Modify panel stays in view until you dismiss it by clicking the tab of another command panel. The top section of the panel always contains name and color controls, optionally the current modifier set buttons, the Modifier List, and the modifier stack and related controls. The remaining contents of the panel (various rollouts with options and controls) update when you select an object, giving you access only to what you can modify about that object.
What you can modify depends on whether an object is classed as a geometric primitive like a sphere, or as another kind of object, such as a light or a space warp. Each category has its own range of possibilities. The contents of the Modify panel are always specific to the category as well as to the selected object. When you make a change from the Modify panel, you immediately see the results transferred to the object.
You can change or delete modifiers by using the Modifier Stack Controls.
To use the Modify panel:
The name of the object appears at the top of the Modify panel, and the remainder of the panel displays settings for the object or the modifier at the top of its stack.
To apply a modifier from the Modify panel: