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GroupDocs.Merger allows to split source document into several resultant documents. Document splitting can be performed in different ways by specifying page numbers array or start/end page numbers and setting different SplitOptions modes.
Here are the possible use cases:

1. Page numbers array specified and splitting mode is set to SplitMode.Pages - specified page numbers indicate exact page numbers, which will be saved to the separate one-page documents.
   Ex: Array{ 3, 6, 8 } will produce 3 documents with 3rd, 6th and 8th pages.

2. Page numbers array specified and splitting mode is set to SplitMode.Interval - specified page numbers indicate the boundaries of the page intervals, which will be saved to the separate multi-page documents.
   Ex: Array{ 3, 6, 8 } will produce 4 page intervals 1-2, 3-5, 6-7, 8-10.

There is also an ability to set parameter RangeMode and obtain only even or odd pages from desired pages range.

The steps to split document to multiple on-page documents are the following:

• Initialize SplitOptions class with output files path format;
• Instantiate Merger object with source document path or InputStream;
• Call split method and pass SplitOptions object to itfor saving resultant documents.

The following code sample demonstrates how to split document to three one-page documents with 3rd, 6th and 8th pages:

with gm.Merger("c:/sample.docx") as merger:
    output_path = "c:/output/document_{0}.{1}"
    split_options = gm.domain.options.SplitOptions(output_path, [3, 6, 8])
    merger.split(split_options)

This code snippet will  produce:

The following code sample demonstrates how to split document to several one-page documents starting from 3rd and ending at 7th page number:

with gm.Merger("c:/sample.docx") as merger:
    output_path = "c:/output/document_{0}.{1}"
    split_options = gm.domain.options.SplitOptions(output_path, 3, 7)
    merger.split(split_options)

This code snippet will  produce:

The following code sample demonstrates how to split document to several one-page documents for odd pages starting from 3rd and ending at 7th page number:

with gm.Merger("c:/sample.docx") as merger:
    output_path = "c:/output/document_{0}.{1}"
    range_mode = gm.domain.options.RangeMode.ODDPAGES;
    split_options = gm.domain.options.SplitOptions(output_path, 3, 7, range_mode)
    merger.split(split_options)

This code snippet will produce:

The following code sample demonstrates how to split document to several multi-page documents:

with gm.Merger("c:/sample.docx") as merger:
    output_path = "c:/output/document_{0}.{1}"
    split_mode = gm.domain.options.SplitMode.INTERVAL;
    split_options = gm.domain.options.SplitOptions(output_path, [3, 6, 8], split_mode)
    merger.split(split_options)

This code snippet will produce: