Extrude Lets you perform manual extrusion via direct manipulation in the viewport. Click this button, and then drag vertically on any polygon to extrude it. Extruding polygons moves them along a normal and creates new polygons that form the sides of the extrusion, connecting the selection to the object. Following are important aspects of polygon ..
The Bevel modifier extrudes shapes into 3D objects and applies a flat or round bevel to the edges. Bevel lets you extrude a shape up to four levels and specify a different outline amount for each level. A common use for this modifier is to create 3D text and logos, but you can apply it ..