[DOCS] Adds content to highlights docs (#142419)

* [DOCS] Adds content to highlights docs

* [DOCS] Adds more content to 8.5 highlights

* [DOCS] Adds missing notable tag

* [DOCS] Fixes broken link

* [DOCS] Adds more images and contents to highlights

* [DOCS] Updates images and minor edits in highlights

* Update docs/user/whats-new.asciidoc

Co-authored-by: Lisa Cawley <lcawley@elastic.co>

* Update docs/user/whats-new.asciidoc

Co-authored-by: Lisa Cawley <lcawley@elastic.co>

* [DOCS] Fixes broken link

* [DOCS] Minor edits for consistency

Co-authored-by: Lisa Cawley <lcawley@elastic.co>

docs/user/whats-new.asciidoc

@@ -1,11 +1,13 @@
 [[whats-new]]
 == What's new in {minor-version}
 
+coming::[8.5.0]
+
 Here are the highlights of what's new and improved in {minor-version}.
 For detailed information about this release,
 check the <<release-notes, release notes>>.
 
-Previous versions: {kibana-ref-all}/8.4/whats-new.html[8.4] | {kibana-ref-all}/8.3/whats-new.html[8.3] | {kibana-ref-all}/8.2/whats-new.html[8.2] 
+Previous versions: {kibana-ref-all}/8.4/whats-new.html[8.4] | {kibana-ref-all}/8.3/whats-new.html[8.3] | {kibana-ref-all}/8.2/whats-new.html[8.2]
 | {kibana-ref-all}/8.1/whats-new.html[8.1] | {kibana-ref-all}/8.0/whats-new.html[8.0]
 
 //NOTE: The notable-highlights tagged regions are re-used in the
@@ -13,4 +15,240 @@ Previous versions: {kibana-ref-all}/8.4/whats-new.html[8.4] | {kibana-ref-all}/8
 
 // tag::notable-highlights[]
 
+[discrete]
+==== Data views &mdash; use without saving
+
+What if you could explore your data or create a visualization without first creating a {data-source}?
+Now you can do just that by selecting *Use without saving* in the *Create {data-source}* form.
+This enables you to quickly explore your data in *Discover*, *Lens*, and *Maps*
+right after ingesting it.
+You can save the {data-source} later
+if you create a search or visualization that you want to share.
+
+[role="screenshot"]
+image::images/highlights-data-view.png[Create data view form showing Use without saving button]
+
+
+[discrete]
+[[highlights-8.5-discover]]
+=== Discover
+
+[discrete]
+==== Resize the date histogram
+
+In addition to toggling the display of the histogram, you can now change its height.
+Your preferences are saved locally in your browser.
+
+[role="screenshot"]
+image::https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/bltad9e5527c8cc0ece/63445400d7dfe71371560635/highlights-histogram.gif[The histogram includes a resize handle to change its height]
+
+[discrete]
+==== More insights in fields list
+
+The field popover in the *Available fields* list now shows
+more data, making it similar to the field popovers in *Lens* and *Fields Statistics*:
+
+* Statistics are based on a sample of 5000 records per shard. Previously the sample size was 500 records.
+* The popover shows up to top 10 values, instead of just 5.
+* The “exist” filter appears at the top of the popover for better visibility.
+* The distribution of values is available for aggregatable fields.
+
+[role="screenshot"]
+image::https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/bltdab342886b2fbe00/634453ffb8e4f9110c2ef4aa/highlights-discover-insights.gif[Statistics, top values, exist filter, and distribution of values in the field list popover]
+
+[discrete]
+[[highlights-8.5-dashboard]]
+=== Dashboard
+
+[discrete]
+==== New time slider control
+
+Add the newest control for interacting with your dashboard data, the time slider control.
+The time slider allows anyone viewing the dashboard to playback and scrub through the data by time,
+or quickly view the data for a specific time range, just like a song or movie.
+
+[role="screenshot"]
+image::images/highlights-dashboard-time-slider.png[Time slider control in a dashboard]
+
+[discrete]
+==== Filters for panels
+
+When filters are applied to the individual visualization panels on your dashboard,
+you can now easily view them without opening the visualization editor and leaving the dashboard.
+Simply click *Panel filters* in the header.
+
+[role="screenshot"]
+image::images/highlights-dashboard-pan-filters.png[Pan filters applied to the visualizations on a dashboard]
+
+[discrete]
+[[highlights-8.5-vis-editors]]
+=== Lens visualization editor
+
+[discrete]
+==== Add query-based annotations
+
+A key method of troubleshooting metric performance is to analyze the events
+that take place at the same time. Now you can add query-based annotations from multiple
+data sources to your *Lens* visualizations. This makes it easy to layer time series events
+and view the relationships between the annotations and other metrics.
+Query-based annotations also come with improved overflow support, additional style options, and a customizable tooltip.
+
+
+[role="screenshot"]
+image::images/highlights-vis-query-annotations.png[Query annotations from separate data views in Lens]
+
+[discrete]
+==== Turn table values into links
+
+Visual cues are important to dashboard users, especially when it comes to clickable values.
+With the Table visualization in *Lens*, you can now enable *Directly filter on click* to turn
+any column value into a link that filters the data, or drills down into the data.
+
+[role="screenshot"]
+image::images/highlights-vis-lens-table.png[Table visualization showing links in the top 5 values column, width="75%"]
+
+[discrete]
+==== Clone visualization layers
+
+When you create visualization layers in *Lens*, you don’t have to start from a blank slate.
+You can now duplicate layers, making it easy to adjust the filters and data options
+from a common starting point.
+
+[role="screenshot"]
+image::images/highlights-vis-duplicate-layer.png[Actions menu for visualizations open to shoe the Duplicate layer item, width="50%"]
+
+[discrete]
+==== Normalize by unit
+
+Need to use *Normalize by unit* for more than just date histogram visualizations in *Lens*?
+Now you can! Suppose you have a metric visualization that displays the count of the
+records field. With *Normalize by unit*, you can view a per minute calculation of the field.
+
+[role="screenshot"]
+image::images/highlights-vis-normalize.png[Menu item for viewing a per minute calculation of a field]
+
+[discrete]
+==== Display the current time
+
+Markers make it easy for anyone viewing your dashboard to quickly understand important
+events on visualizations. With the new *Show current time marker* axis option,
+you can add a red line to signify where “now” is on time series visualizations.
+
+[role="screenshot"]
+image::images/highlights-vis-time.png[Visualization showing a red line that indicates the current time, width="75%"]
+
+[discrete]
+==== Collapse by option
+
+Let’s say you’re creating a partition chart with sampled data, such as metrics,
+and want to break down the last values from each reporting dimension, such as hosts.
+You can use the new *Collapse by* option to break down and summarize the
+result of each last value from hosts without displaying the detailed reporting dimension.
+
+[role="screenshot"]
+image::images/highlights-vis-collapse.png[Collapse by option for breaking down and summarizing the last value, width="75%"]
+
+[discrete]
+[[highlights-8.5-maps]]
+=== Maps &mdash; hide tooltips
+
+Tooltips display when you hover over a document or cluster in a map.
+Don't want to display them? Turn them off with
+the new *Show tooltips* toggle in *Layer settings*.
+
+[role="screenshot"]
+image::https://images.contentstack.io/v3/assets/bltefdd0b53724fa2ce/blt553f1d51649d508d/63445a7f2a8d0a11633dbb8f/highlights-maps.gif[Show tooltips control in Layer settings]
+
+
+[discrete]
+[[highlights-8.5-machine-learning]]
+=== Machine Learning
+
+[discrete]
+==== Anomaly detection jobs from Lens
+
+You can now create anomaly detection jobs from the flyout of a *Lens* visualization.
+Enter a job ID before creating the job, so it starts automatically after saving.
+For a more advanced configuration, follow the link that takes you to the ML job wizard.
+
+[role="screenshot"]
+image::images/highlights-ml-lens.png[Flyout for creating an anomaly detection job from Lens]
+
+[discrete]
+==== Log pattern analysis
+
+You can now select a data view and message field,
+apply optional filters, and then run on-demand categorization analysis.
+Messages that are similar are grouped using the same underlying algorithms
+as a machine learning categorization job. The distribution of the documents in each category
+are highlighted on the main chart. You can then open *Discover*,
+use one or more of these categories as a filter to view the matching documents,
+and continue your investigation.
+
+[role="screenshot"]
+image::images/highlights-ml-log-analysis.png[Chart showing the distribution of documents in each cateogry]
+
+[discrete]
+==== Locations of anomalous results in Maps
+
+This release adds a link to *Maps* in the *Anomaly Explorer* and *Single Metric Viewer*
+for any anomalies where the source data contains geo fields,
+even if the analysis does not use the location field directly.
+View the anomaly on the map by following the link.
+For example, view the location of a client making an unusually high number of
+requests that failed with a `page not found` 404 error.
+
+[discrete]
+[[highlights-8.5-security]]
+=== Access agreement enhanced
+
+The {kibana-ref}/xpack-security-access-agreement.html[access agreement]
+now allows admins to set a default access
+agreement message that applies to all authentication providers.
+If you set the new `xpack.security.accessAgreement.message` setting, it will apply to all providers
+for which you do not specify an access agreement.
+
+[discrete]
+[[highlights-8.5-collaboration]]
+=== Collaboration with Cases
+
+[discrete]
+==== Case assignment
+
+This release adds the ability to assign a {kibana-ref}/cases.html[case] to users.
+You can do so either while creating a case or in an existing case by using
+the “assignees” UI in *Observability*, *Elastic Security*, and *Stack Management*.
+
+[role="screenshot"]
+image::images/highlights-cases-assignees.png[Collaborate with Cases UI]
+
+You can assign one or more users (and unassign as needed).
+The UI builds on previous releases, which introduced the ability for users
+to customize their avatars by selecting an image or color.
+Avatars add visual help in easily identifying and disambiguating users.
+
+The assignees and their avatars show up in each case.
+They also now appear in the central *Cases* view that lists all existing
+cases in *Observability*, *Elastic Security*, and *Stack Management*.
+On this view, you can easily filter through the cases assigned to you and all other users.
+
+[role="screenshot"]
+image::images/highlights-cases-view.png[Cases view listing that lists all assigned users]
+
+[discrete]
+==== User search
+
+You can now search for users by their full name,
+username, or email as part of the case assignment flow.
+{kib} users from all authentication realms are searchable. On first access,
+{kib} creates a user profile and surfaces it in the user search results.
+
+The user search UI includes auto-complete and search highlights.
+
+[role="screenshot"]
+image::images/highlights-cases-user-search.png[User search view with auto-complete, highlights, user avatars, user email, width="75%"]
+
+User search adheres to {kib} role-based access control. Users who do not have access to *Cases* within the
+space will not surface in the results. For more details, go to {kibana-ref}/setup-cases.html[Configure access to cases].
+
 // end::notable-highlights[]