* Op-eds (opposite editorials): These are opinion pieces written by individuals outside the newspaper's editorial board, offering diverse perspectives on current events. This is the most common usage of the term and arguably what's usually intended.
* Letters to the Editor: Reader responses to articles and editorials published in the newspaper.
* Columns: Regularly featured opinion pieces by specific columnists, sometimes focused on particular areas like politics, sports, or culture.
* Syndicated content: Opinion pieces or features from other news organizations.
In short, the "opposite editorial page" is a space dedicated to varied viewpoints and reader engagement, contrasting with the unified editorial stance presented on the editorial page itself. It's a platform for diverse voices and often provides a counterpoint to, or further discussion on, the topics covered in the editorials.