Access
Click 
Save or Save As Save Copy As. Any change in referenced files causes the Save dialog box to display.
- Files Requiring Save
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Lists the referenced files with changes that are not yet saved.
- Save
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Specifies whether to save the file, all listed files, or a selected set of files.
When you save a drawing, displays the dependent files that were changed without being saved. You can save all changed files or select the files to save.