1. EDT 310 - Chapter 31 Introduction to Drawings, Saving Drawings Chapter 3 Sacramento City College EDT 310

2. EDT 310 - Chapter 32 Material to Cover u Selecting AutoCAD Commands u Function Keys u Drawing with keyboard coordinates u LINE command u ID command u OSNAP settings u LIMITS u UNITS u SNAP u GRID and ORTHO

3. EDT 310 - Chapter 33 Selecting AutoCAD Commands

4. EDT 310 - Chapter 34 Selecting AutoCAD Commands u Commands may be selected in four ways u 1. Executed by picking a toolbar button or icon u 2. Selected from one of the pull-down menus u 3. Selected from the digitizer table menu overlay u 4. Typed at the keyboard

5. EDT 310 - Chapter 35 Selecting AutoCAD Commands u Command Line Editing u You can select previously used commands by using the up and down arrow keys u This capability allows for fast, repeated use of the same command. u Just hit the “up” arrow to recall the command.

6. EDT 310 - Chapter 36 Keys

7. 7 Keys u The [Esc] key u Control Keys u Function Keys

8. EDT 310 - Chapter 38 Keys u The [Esc] key u Cancels a command and returns to the Command: prompt

9. EDT 310 - Chapter 39 Keys u Control Keys u Control functions are activated by pressing and holding the [Ctrl] key while pressing a second key.

10. EDT 310 - Chapter 310 Keys u Ctrl B - Snap mode (toggle) u Ctrl C - Copy u Ctrl D - coordinate display on/off toggle u Ctrl E - crosshairs in isoplane toggle (left/right/top) u Ctrl G - Grid on/off toggle u Ctrl H - same as backspace u Ctrl K - PICKADD system variable toggle u Ctrl L - Ortho mode toggle u Ctrl O - Open

11. EDT 310 - Chapter 311 Keys u Ctrl P - Print (Plot) u Ctrl R - toggle viewport u Ctrl S - Save u Ctrl T - Tablet mode toggle u Ctrl V - Paste u Ctrl X - Cut u Ctrl Y - Redo u Ctrl Z - Undo

12. EDT 310 - Chapter 312 Drawing Aids

13. EDT 310 - Chapter 313 Drawing Aids u AutoCAD provides drawing aids that help prepare the drawing layout, increase speed and efficiency and ensure accuracy. u GRID u SNAP u ORTHO

14. EDT 310 - Chapter 314 The GRID

15. EDT 310 - Chapter 315 The GRID u A grid is a predefined spacing of points which is used to help lay out a drawing u The GRID command places this pattern of dots at any desired spacing. u It can be equal or non-equal spacing u The grid pattern shows only within the drawing limits u Entering the GRID command provides a prompt showing the default grid spacing and several other options.

16. EDT 310 - Chapter 316 The GRID Command

17. EDT 310 - Chapter 317 GRID Command Command: GRID Grid spacing (X) or ON/OFF/Snap/Aspect <0.5…): 0.25

18. EDT 310 - Chapter 318 GRID Command u If the grid is too close to display on the screen, you will get the “Grid too dense to display” message. u The grid spacing may be changed at any time u The grid may be turned on or off.

19. EDT 310 - Chapter 319 GRID Command u Methods for turning the grid on or off: u Click the grid button on the status bar u or u The [F7] function key u or u [Ctrl + [G]

20. EDT 310 - Chapter 320 GRID Command u Setting a different horizontal/vertical grid spacing can be done. u Select the Aspect option of the GRID command.

21. EDT 310 - Chapter 321 GRID Command u Command: GRID u Grid spacing (X) or ON/OFF/Snap/Aspect : A u Horizontal spacing (X) : 1 u Vertical spacing (Y) :.5

22. EDT 310 - Chapter 322 The SNAP Command

23. EDT 310 - Chapter 323 SNAP

24. EDT 310 - Chapter 324 SNAP u The cursor crosshairs move freely on the screen u It may be difficult to accurately place a point u It would be desirable to cause the cursor to move only to an invisible grid.

25. EDT 310 - Chapter 325 SNAP u Snap grid or snap resolution controls the movement of the cross-hairs to this invisible grid. u It is different than the GRID command u The two commands SNAP and GRID are generally used together.

26. EDT 310 - Chapter 326 The SNAP Command

27. EDT 310 - Chapter 327 The SNAP Command u Properly setting the Snap Grid can greatly increase your drawing speed. u The SNAP command is used to set the invisible snap grid.

28. EDT 310 - Chapter 328 The SNAP Command u Command: SNAP u Snap spacing or ON/OFF/Aspect/Rotate/Style u Pressing [Enter] accepts the value shown in brackets. u If a different spacing is required, such as 0.25, enter the new value.

29. EDT 310 - Chapter 329 The SNAP Command u Command: SNAP u Snap spacing or ON/OFF/Aspect/Rotate/Style : 0.25 u This sets up snap at 0.25

30. EDT 310 - Chapter 330 Rotating the SNAP Grid

31. EDT 310 - Chapter 331 Rotating the SNAP Grid u The normal snap grid is horizontal rows and vertical columns. u The grid can be rotated using the Rotate option of the SNAP command. Command: SNAP Snap spacing or ON/OFF/Aspect/Rotate/Style : R Basepoint :(press [Enter], type a new coordinate value, or pick a new base point. Rotation angle : 25

32. EDT 310 - Chapter 332 Setting the SNAP Style u The Style option of the SNAP command allows you to set the snap grid to either a u Standard (default) or u Isometric pattern. u Command: SNAP u Snap spacing or ON/OFF/Aspect/Rotate/Style : S u Standard/Isometric S

33. EDT 310 - Chapter 333 Setting Grid Spacing Relative To SNAP Spacing u The visible grid can be set to be the same as the invisible snap grid. u Choose the Snap option of the GRID command.

34. EDT 310 - Chapter 334 Setting Grid Spacing Relative To SNAP Spacing u Command: GRID u Grid spacing or ON/OFF/Aspect : 2x u In this case the GRID spacing would be 2x the SNAP setting.

35. EDT 310 - Chapter 335 Limits

36. EDT 310 - Chapter 336 The AutoCAD Drawing Area u The AutoCAD drawing area is basically INFINITE in all directions. u Think “outer space” u It is beneficial to “define a drawing area” that represents the size of your project.

37. EDT 310 - Chapter 337 The AutoCAD Drawing Area u LIMITS allow you to define a reasonable drawing area. u This area can be turned u On u Off u You can draw outside the area when LIMITS is turned off.

38. EDT 310 - Chapter 338 Limits u LIMITS are the extent of the drawing area. u If you wanted a 17” x 11” drawing area, you would set the LIMITS to 17, 11. u The first number is the horizontal dimension. u The second number is the vertical dimension.

39. EDT 310 - Chapter 339 Limits u LIMITS can be turned ON or OFF. u To set LIMITS, enter "LIMITS" at the Command: prompt. u AutoCAD restricts you from drawing outside the area defined by the LIMITS.

40. EDT 310 - Chapter 340 Limits u If you wanted an 11” x 8.5” drawing area, you would set the LIMITS to 11, 8.5. u The first number is the horizontal dimension u The second number is the vertical dimension.

41. EDT 310 - Chapter 341 The “ORTHO” Mode

42. EDT 310 - Chapter 342 The ORTHO Mode u The term ORTHO comes from the word “orthogonal”, which means at “at right angles”. u The ORTHO mode restricts the cursor movement to the X, Y plane ONLY.

43. EDT 310 - Chapter 343 The ORTHO Mode u Turn ORTHO mode on or off with u The F8 key. u The Cntrl L key combination.