Save a Drawing
You save drawing files for later use just as you do with other Microsoft Windows applications. AutoCAD also provides automatic saving, backup files, and other options for saving.
When you are working on a drawing, you should save it frequently. Saving protects you from losing work in the event of a power failure or other unexpected event. If you want to create a new version of a drawing without affecting the original drawing, you can save it under another name.
The file extension for AutoCAD drawing files is .dwg, and unless you change the default file format in which drawings are saved, drawings are saved in the latest drawing-file format. This format is optimized for file compression and for use on a network.
Save Your Drawing Automatically
If you turn on the automatic saving option, your drawing is saved at specified time intervals. By default, files saved automatically are temporarily assigned the name filename_a_b_nnnn.sv$. Filename is the current drawing name, a is the number of open instances of the same drawing file in the same AutoCAD session, b is the number of open instances of the same drawing in different sessions of AutoCAD, and nnnn is a random number generated by AutoCAD.
These temporary files are automatically deleted when a drawing closes normally. However, the files remain in the event of a program failure or a power failure. To recover a previous version of your drawing from the automatically saved file, rename the file using a .dwg extension in place of the .sv$ extension.
Use Backup Files
If you turn on automatic backups, AutoCAD saves the previous version of your drawing files to a file with the same name and a .bak file extension. To recover the previous version of your drawing from a backup file, rename the file using a .dwg extension.
Save Part of a Drawing File
If you want to create a new drawing file from part of an existing drawing, you can use BLOCK or WBLOCK. With either command, you can select objects or specify a block definition in your current drawing and save them in a new drawing file. You can also save a description along with the new drawing.
Save to a Different Type of Drawing File
You can save a drawing to an earlier version of the drawing format (DWG) or drawing interchange format (DXF), or save a drawing as a template file. Choose the format from Files of Type in the Save Drawing As dialog box.
Reduce the Time Required to Save a Drawing File
You can reduce the time required to save a drawing file if you specify incremental saves rather than full saves. An incremental save updates only those portions of the saved drawing file that you changed.
When you use incremental saves, drawing files will contain a percentage of potentially wasted space. This percentage increases after each incremental save until it reaches a specified maximum, at which time a full save is performed instead. You can set the incremental save percentage in the Open and Save tab of the Options dialog box or by setting the value of the system variable ISAVEPERCENT. If you set the value of ISAVEPERCENT to 0, all saves are full saves.
To reduce the size of drawing files, it is recommended that you perform a full save (with IPERCENTSAVE set to 0) before transmitting or archiving a drawing.
Avoid File Name Issues for International Work
If you share drawing files with companies in other countries and regions, the drawing file names might contain characters that are not available in other languages.
For example, a drawing file created in China might be saved with double-byte characters in the file name. When this drawing file is transmitted to a different language version of Windows, either of the following will occur:
If you do not have Asian language support turned on, the file name characters appear as a series of question marks in Windows Explorer
If you do have Asian language support turned on, the file name characters are visible in Windows Explorer
In either case, you will not be able to open the drawing file in AutoCAD LT unless you rename it. This is also true for special characters in file names of European and other languages.
To avoid these issues when your language uses double-byte characters or special characters, do not use high ASCII values (values of 80 hexadecimal and above) when choosing a file name.
To save a drawing
On the File menu, click Save.
If you previously saved and named the drawing, AutoCAD saves any changes and redisplays the Command prompt. If you have never saved the drawing, the Save Drawing As dialog box is displayed.
In the Save Drawing As dialog box under File Name, enter the new drawing name; the file extension is not required. Then click Save.
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When you are working on a drawing, you should save it frequently. Saving protects you from losing work in the event of a power failure or other unexpected event. If you want to create a new version of a drawing without affecting the original drawing, you can save it under another name.
The file extension for AutoCAD drawing files is .dwg, and unless you change the default file format in which drawings are saved, drawings are saved in the latest drawing-file format. This format is optimized for file compression and for use on a network.
Save Your Drawing Automatically
If you turn on the automatic saving option, your drawing is saved at specified time intervals. By default, files saved automatically are temporarily assigned the name filename_a_b_nnnn.sv$. Filename is the current drawing name, a is the number of open instances of the same drawing file in the same AutoCAD session, b is the number of open instances of the same drawing in different sessions of AutoCAD, and nnnn is a random number generated by AutoCAD.
These temporary files are automatically deleted when a drawing closes normally. However, the files remain in the event of a program failure or a power failure. To recover a previous version of your drawing from the automatically saved file, rename the file using a .dwg extension in place of the .sv$ extension.
Use Backup Files
If you turn on automatic backups, AutoCAD saves the previous version of your drawing files to a file with the same name and a .bak file extension. To recover the previous version of your drawing from a backup file, rename the file using a .dwg extension.
Save Part of a Drawing File
If you want to create a new drawing file from part of an existing drawing, you can use BLOCK or WBLOCK. With either command, you can select objects or specify a block definition in your current drawing and save them in a new drawing file. You can also save a description along with the new drawing.
Save to a Different Type of Drawing File
You can save a drawing to an earlier version of the drawing format (DWG) or drawing interchange format (DXF), or save a drawing as a template file. Choose the format from Files of Type in the Save Drawing As dialog box.
Reduce the Time Required to Save a Drawing File
You can reduce the time required to save a drawing file if you specify incremental saves rather than full saves. An incremental save updates only those portions of the saved drawing file that you changed.
When you use incremental saves, drawing files will contain a percentage of potentially wasted space. This percentage increases after each incremental save until it reaches a specified maximum, at which time a full save is performed instead. You can set the incremental save percentage in the Open and Save tab of the Options dialog box or by setting the value of the system variable ISAVEPERCENT. If you set the value of ISAVEPERCENT to 0, all saves are full saves.
To reduce the size of drawing files, it is recommended that you perform a full save (with IPERCENTSAVE set to 0) before transmitting or archiving a drawing.
Avoid File Name Issues for International Work
If you share drawing files with companies in other countries and regions, the drawing file names might contain characters that are not available in other languages.
For example, a drawing file created in China might be saved with double-byte characters in the file name. When this drawing file is transmitted to a different language version of Windows, either of the following will occur:
If you do not have Asian language support turned on, the file name characters appear as a series of question marks in Windows Explorer
If you do have Asian language support turned on, the file name characters are visible in Windows Explorer
In either case, you will not be able to open the drawing file in AutoCAD LT unless you rename it. This is also true for special characters in file names of European and other languages.
To avoid these issues when your language uses double-byte characters or special characters, do not use high ASCII values (values of 80 hexadecimal and above) when choosing a file name.
To save a drawing
On the File menu, click Save.
If you previously saved and named the drawing, AutoCAD saves any changes and redisplays the Command prompt. If you have never saved the drawing, the Save Drawing As dialog box is displayed.
In the Save Drawing As dialog box under File Name, enter the new drawing name; the file extension is not required. Then click Save.
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For fixing issues with .dwg files you may use dwg recovery. It is able to view the results of restoring autocad data. The utility is compatible with all supported Windows OS. The tool is easy to use interface for any experienced users.
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