Hint: Removes unused items, such as block definitions and layers, from the drawing.

(a)  

Hint: This command moves only the vertices and endpoints that lie inside the crossing selection, leaving those outside unchanged.

(a)  

Hint: This is a collection of objects that are combined into a single named object.

(a)  

Hint: This is the primary method for organizing the objects in a drawing by function or purpose.

(a)  

Hint: Using this command lets you easily copy properties from one object to another.

(a)  

Hint: When you use this, only the menus, toolbars, and palettes that are relevant to a task are displayed

(a)  

Hint: It's a limitless 3D drawing area.

(a)  

Hint: It is a property assigned to graphical objects, hatches, leader lines, and dimension geometry that results in thicker, darker lines.

(a)  

Hint: Controls the appearance and behavior of objects, and are used to organize a drawing.

(a)