> For the complete documentation index, see [llms.txt](https://docs.fact-finder.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fact-finder.com/docs/basic-settings/recommendations/matrix.md).
# Matrix
## **Summary**
The Matrix section is located in a separate tab of the Recommendations Basic Settings block. It provides an interface to selectively adjust the relationships between various categories (or other content stored in the matrices).
The relationships between categories on a level are displayed in an interactive matrix view.
If there is more than one matrix, these can be selected from **a dropdown menu**  at the top of the page. To make changes to a matrix' field weight, go to matrix settings.
A matrix now displays all rows and columns on one page. Scroll through the matrix to find an intersection. You can limit clutter by **choosing the number of displayed lines** (maximum 100) .
Row and column labels stay visible while you scroll. Hover over a cell to trace its row and column. An overlay highlights the corresponding labels.
Use the new search inputs above the matrix to narrow the view to a smaller subset:
* **Search rows** filters by row name or names.
* **Search columns** filters by column name or names.
Lines and columns are sorted alphabetically.
## **Relationship matrix**
**Relationships** between categories are displayed in red or green .
The redder the cell is, the less compatible the categories are. Products in those categories are recommended together less frequently or not at all.
The greener the relationship, the more compatible the categories are.
To change a relationship, click on it and adjust the slider in the pop-up.
Click **Reset to default Values** to undo changes.
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