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Once enabled, the option is activated in the "create a new project" form when you can specify the percentage of a particular file at which repetitions occupy, at which the option shall be activated:

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This feature in question hides repeated segments and populates the repetitions with the translation of the parent/original segment upon target generation, allowing for great consistency of translation.

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Good to know!

Remember that, while repeated segments in XTM Workbench can be hidden, they are automatically populated with the newest translation in subsequent files so they will be translated accordingly in a target file once that file is generated again. Also, the Metrics will still display those repetitions, and the file concerned will show the original number of segments in the Project editor → Workflow section.