Complex sentence: Once the articles are created, the template can be updated and when transcluded in the new article automatically adds the composer's image, italicises the title, and adds links to their other operas with their premiere dates.
Split into simpler sentences: Once the articles are created, the template can be updated. When transcluded in the new article, the template will automatically add the composer's image, italicise the title, and add links to the composer's other operas with their premiere dates.