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      7.Select OK to accept the change.

BACK UP FILES and RECOVER

       BACK UP FILES

      When you save a drawing file, Autocad creates a file with a .dwg extension. For example, if you save a drawing as 12b, Autocad saves it as 12b.dwg. The next time you save that same drawing, Autocad replaces the old with the new and renames the old version 12b.bak. The old version is now a back up file. (Only 1 backup file for each drawing file is stored.)

       How to open a back up file:

      You can’t open a “.bak” file.

      It must first be renamed with a “.dwg” file extension.

       How to view the list of back up files:

      The backup files will be saved in the same location as the drawing file.

      You must use Windows Explorer to locate the .bak files.

       How to rename a back up file:

      1.Right click on the file name.

      2.Select “Rename”.

      3.Change the .bak extension to .dwg and press <enter>.

       RECOVERING A DRAWING

      In the event of a program failure or a power failure any open files should be saved automatically. (Refer to page 2-24)

      When you attempt to re-open the drawing the Drawing Recovery Manager will display a list of all drawing files that were open at the time of a program or system failure. You can preview and open each .dwg or .bak file to choose which one should be saved as the primary file.

EXITING AUTOCAD

      To safely exit AutoCAD follow the instructions below.

      1.Save all open drawings.

      2.Start the EXIT procedure using one of the following.

       Ribbon = None or

Application Menu =

       or Keyboard = Exit <enter>

      If any changes have been made to the drawing since the last Save As, the warning box shown below will appear asking if you want to SAVE THE CHANGES?

      Select YES, NO or CANCEL.

EXERCISE 2A

       INSTRUCTIONS:

      1.Start a NEW file using 2015-Workbook Helper.dwt.

      2.Draw the objects below using:

      A.Line command

      B.Ortho (F8) ON when drawing Horizontal and Vertical lines.

      C.Ortho (F8) OFF when drawing lines on an Angle.

      D.Turn Increment Snap (F9) ON

      E.Turn Osnap (F3) OFF

      F.Turn Grid (F7) ON

      G.Use the Close option

      3.Save the drawing as: EX2A

       EXERCISE 2B

       INSTRUCTIONS:

      1.OPEN EX2A, if not already open.

      2.Erase the missing Lines as shown.

      A.Turn Osnap (F3) OFF (It will be easier to move the cursor accurately)

      3.Save the drawing as: EX2B

       EXERCISE 2C

       INSTRUCTIONS:

      1.Start a NEW file using 2015-Workbook Helper.dwt.

      2.Draw the objects below using:

      A.Line command

      B.Ortho (F8) ON when drawing Horizontal and Vertical lines.

      C.Ortho (F8) OFF when drawing lines on an Angle.

      D.Turn Increment Snap (F9) ON

      E.Turn Osnap (F3) OFF

      F.Turn Grid (F7) ON

      G.Use the Shift Key to toggle Ortho ON and OFF

      3.Save the drawing as: EX2C

       EXERCISE 2D

       INSTRUCTIONS:

      1.Start a NEW file using 2015-Workbook Helper.dwt.

      2.Draw the objects below using:

      A.Line command

      B.Ortho (F8) ON when drawing Horizontal and Vertical lines.

      C.Ortho (F8) OFF when drawing lines on an Angle.

      D.Turn Increment Snap (F9) ON

      E.Turn Osnap (F3) OFF

      F.Turn Grid (F7) ON

      G.Use the Shift Key to toggle Ortho ON and OFF

      3.Save the drawing as: EX2D

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