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Docs: Multiple changes to make document easier to read (#23842)

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* multiple changes to make document easier to read

* Update docs/sources/features/datasources/loki.md

Co-Authored-By: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* Update docs/sources/features/datasources/loki.md

Co-Authored-By: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>

* Update docs/sources/features/datasources/loki.md

Co-Authored-By: Arve Knudsen <arve.knudsen@gmail.com>

* Update docs/sources/features/datasources/loki.md

Co-Authored-By: Arve Knudsen <arve.knudsen@gmail.com>

Co-authored-by: Diana Payton <52059945+oddlittlebird@users.noreply.github.com>
Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>
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docs/sources/features/datasources/loki.md
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@ -43,12 +43,12 @@ The Derived Fields configuration allows you to:
* Add fields parsed from the log message.
* Add a link that uses the value of the field.
You can use this functionality to link to your tracing backend directly from your logs, or link to a user profile page if a userId is present in the log line. These links will be shown in the [log details](/features/explore/#labels-and-parsed-fields).
You can use this functionality to link to your tracing backend directly from your logs, or link to a user profile page if a userId is present in the log line. These links appear in the [log details](/features/explore/#labels-and-parsed-fields).
{{< docs-imagebox img="/img/docs/v65/loki_derived_fields.png" class="docs-image--no-shadow" caption="Screenshot of the derived fields configuration" >}}
Each derived field consists of:
- **Name:** Shown in the log details as a label.
- **Regex:** A Regex pattern that runs on the log message and captures part of it to as the value of the new field. Can only contain capture a single group.
- **Regex:** A Regex pattern that runs on the log message and captures part of it as the value of the new field. Can only contain a single capture group.
- **URL**: A URL template used to construct a link next to the field value in log details. Use special `${__value.raw}` value in your template to interpolate the real field value into your URL template.
You can use a debug section to see what your fields extract and how the URL is interpolated. Click **Show example log message** to show the text area where you can enter a log message.
@ -98,7 +98,7 @@ Examples:
The [same rules that apply for Prometheus Label Selectors](https://prometheus.io/docs/prometheus/latest/querying/basics/#instant-vector-selectors) apply for Loki Log Stream Selectors.
Another way to add a label selector, is in the table section, clicking on the **Filter** button beside a label will add the label to the query expression. This even works for multiple queries and will the label selector to each query.
Another way to add a label selector is in the table section. Click **Filter** beside a label to add the label to the query expression. This even works for multiple queries and will add the label selector to each query.
### Search Expression