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Optimize Loading for Large Files

If you open a document that exceeds the limit configured in Open preferences (the default limit is 30 MB), a dialog box will be displayed prompting you to choose whether you want to optimize the loading of the document for large files or for huge files. If you choose the Optimize loading for large files option (typically recommended for files smaller than 300 MB), a special memory optimization is implemented so that the total memory allocated for the application is not exceeded. A temporary buffer file is created on disk and the available free disk space needs to be at least double the size of the file you want to open.

When opening a large file in this optimized editing environment, some editing features are disabled, including:
  • The file can only be opened in Text mode.
  • The automatic validation is not available.
  • The XPath filter is disabled in the Find/Replace dialog box.
  • The bidirectional Unicode support (right-to-left writing) is disabled.
  • The Format and indent the document on open option is automatically deselected for non-XML documents. For XML documents, the formatting is done while optimizing the memory usage by ignoring the options set in the Format preferences page.
  • Localizations for the results of an XPath expression will be less precise.