Use the File > Save As command to save the objects in the active worksheet to a file that you specify.  The command allows you to enter a file name and select the type of file to use for saving the objects. 

•        If the DfW file type is selected, all the objects in the worksheet (i.e. mathematical expressions, plot images, text, and OLE objects) are saved in the file.   Also, all the function definitions, variable assignments, domain declarations, and state variable settings are saved as well.  When the dfw file is opened at a later time using a File > Open command7XA11Y, all the worksheet objects, definitions, assignments, declarations, and state variables existing at the time of the save will be restored.  If you do not specify an extension, dfw is used as the extension for dfw files.

•        If the mth file type is selected, only the mathematical expressions in the worksheet and their corresponding annotations are saved in the file.  The expressions and annotations in the mth file can be reloaded at a later time using a File > Open command7XA11Y or a File > Load > Math File commandI8.CN8.  If you do not specify an extension, mth is used as the extension for mth files.


If saving an mth file, the File > Save As command provides the following options not available when saving a dfw file:

•        You can choose to save all the expressions in the active worksheet or just the selected (i.e. highlighted) expressions.

•        Along with the expressions, you can choose to save the Derive state variable settings (i.e. the precision, notation, radix base, etc.).  All of the state variables and their values will be written to the mth file before any of the expressions are saved (see Using and Saving State VariablesUsing_and_Saving_State_Variables).

•        If an mth file with the same name already exists, you can choose to rename the extension of the existing mth file to be bak before saving the new mth file.


Expressions and the Derive state variable settings are saved as ASCII text in mth files.  These files can be examined and/or modified by any editor capable of editing standard text files.  Long expressions in mth files are written on multiple lines using a tilde (~) as the continuation character.  The objects saved in dfw files cannot be edited using standard text editors.


Other Algebra Window File commandsAlgebra_Window_File_commands 

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