Command/Option | Definition |
Select Options | Methods for selecting entities on the screen in AutoCAD |
Entity | The smallest predefined element in a drawing |
Selection Set | Allows you to group objects (entities) together for modification. |
Window option | Selects entities completely inside the box. |
Crossing option. | Selects entities inside the box as well as any it touches. |
Remove option | Changes from Select Objects to Remove Objects |
Add option | Changes Remove Objects back to Select Objects |
Last option | Selects the last entity you created. |
Previous option | Selects the previous selection set. |
Fence option | Draws a series of lines that selects any objects the line touches. |
GRIPS | Handles that allow you to select objects before applying the command. |
CPOLY option | Similar to a crossing box, but allows you to create an irregular shape polygon that selects all entities inside as well as any it touches. |
WPOLY option | Similar to Window, but allows you to create an irregular poly window around objects to be selected and selects only those completely inside. |
All option | Selects all entities within the drawing. |
OOPS command | Restores the previously erased object. |
UNDO command | Reverse the previous command(s). |
REDO command | reverses the previous Undo command. |
Types of entities in AutoCAD | Lines, Arcs, Circles, Dimensions, Text, Blocks, Points, Shapes, & Solids. |
Verb/Noun Selection Technique | Traditional method of selecting objects. Select a command, then select objects. |
Noun/Verb Selection Technique | Utilizes Grips to reverse this process. Selects entities first, then applies the command. |
5 Commands Available using GRIPS | Mirror, Stretch, Rotate, Move, and Scale |
3 types of Symmetry | Reflection, Rotation, Translation |
Regular Polygon | All sides are equal, internal angles are equal. |
Pentagon | 5 sided regular polygon. |
Hexagon | 6 sided regular polygon. |
Octagon | 8 sided regular poygon. |
Inscribed | Inside the imaginary circle. |
Circumscribed | Outside the imaginary circle. |
Rectangle | Opposite sides are equal, internal angles are 90 degrees. |
Square | All four sides are equal, internal angles are 90 degrees. |
DONUT command | Produces solid-filled or thick lined circles. |
Radius | 1/2 the diameter of a circle. |
ARC continue option | Continues an arc tangent to the previous arc. |
ERASE command | Deletes objects selected by the user. |
Concentric | Two or more circles that share the same center. |
Eccentric | Two or more circles that do not share the same center. |
Command Alias | Abbreviations that usually consist of the first 1-3 letters of a command name. |
ESC key | Cancels the previously selected command or action. |
LINE command | Allows you to draw a line in any direction. |
ORTHO mode | Forces a line to be drawn either horizontally or vertically. |
Rubber-Band effect | Stretching effect when drawing command is active that let's you see the arc, circle, line, etc., "grow" on the screen. |
How do you re-enter the previous command? | Space bar, Enter key, or Right-Mouse click. |