The Modeling tab gives access to various commands that are useful for creating suface models. Some buttons on this tab are disabled unless, for example, there are objects in the scene to which a modifier can be applied.
Procedures
To create a spline shape, or primitive object:
Click the button; for example, Line, Box, or CV Surf.
To apply a modifier:
Select the objects to modify.
Click the modifier button.
For example, you might create a line, and then choose the lathe modifier to turn the line into a surface.
To isolate a single object:
Select a single object.
Click Isolate Tool.
All other objects are hidden, and the active viewport zooms to the extents of the isolated object.
To exit isolation mode:
In the ISOLATED dialog, click Exit Isolated.
Other objects are displayed again. The viewport that was zoomed in on the isolated object, is now zoomed to the extents of all objects in the scene.