# Links
There are a few links you can use with different purposes.
| Link type | Markup | Renders as | Description |
|----------------------------------------------|------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| External Link | ```rst
`External Link `_
``` | [External Link](https://docs.scylladb.com/) | Use this markup to create a link to another site or project. When rendered it has an arrow pointing out icon. It opens the content in a new tab. |
| Internal Cross-reference | ```rst
:ref:`Internal Link `
``` | [Internal Link](#here) | This is an internal cross reference. It requires a bookmark. Content opens in the same tab. |
| Internal Cross-reference Bookmark | ```rst
.. _here:
``` | | This is an internal cross reference bookmark. It requires an internal cross-reference anchor (above). It does not render, but serves as a point to link to. |
| Internal Cross-reference to Parameters | ```rst
:ref:`Link to a config param `
``` | Renders the parameter name as a hyperlink. | This is an internal cross-reference to a parameter on the [Configuration Parameters](https://opensource.docs.scylladb.com/stable/reference/configuration-parameters.html) page.
It does NOT require a bookmark, as parameter names on that are page implicit bookmarks. Content opens in the same tab.
This option only applies to the `scylladb/sylladb` and `scylladb/scylla-enterprise` projects. |
| Internal Cross-reference to Parameter Gropus | ```rst
:ref:`Link to a config param `
``` | Renders the name of the parameter group as a hyperlink. | This is an internal cross-reference to a parameter group on the [Configuration Parameters](https://opensource.docs.scylladb.com/stable/reference/configuration-parameters.html) page.
It does NOT require a bookmark, as group names on that are page implicit bookmarks. Content opens in the same tab.
This option only applies to the `scylladb/sylladb` and `scylladb/scylla-enterprise` projects. |
| Internal Doc Reference | ```rst
:doc:`Internal Doc <../index>`
``` | [Internal Doc](https://sphinx-theme.scylladb.com/stable/index.md) | This is an internal doc cross reference. it looks for a file. A full path is required. |
| Download Link | ```rst
:download:`download `
``` | [`download`](https://sphinx-theme.scylladb.com/stable/_downloads/be7f6be25acd9f7165be42ec04587130/index.rst) | This opens a download window. It is used to help users download software or files. |
| Page Anchor Link | ```rst
:page-anchor:`System requirements `
``` | [System requirements](https://sphinx-theme.scylladb.com/stable/examples/headings.md#system-requirements) | Links to an arbitrary anchor of any page in the project, without validating the anchor.
Use it for anchors that Sphinx cannot see at build time because JavaScript generates them,
such as endpoint deep links on API reference pages rendered with Redoc or Swagger UI.
Whenever possible, prefer built-in Sphinx roles such as `:ref:` or `:doc:`,
which validate the target at build time. |