dd6958bf3e8dfeb13dad8906a5c471293c471152
mspeir
  Wed Jul 22 07:56:17 2026 -0700
Update Gateway, Table Browser, and Custom Track tutorials for the new assembly search box

Replaced the old Clade/Genome/Assembly drop-down wording and screenshots with
the current genome search box, re-recorded the step GIFs, and expanded the
guided walkthroughs (Table Browser filter/intersection and output fields,
Custom Track track line, Gateway GenArk/recent-genomes and species tree).

refs #37355

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

diff --git docs/tutorials/gatewayTutorial.md docs/tutorials/gatewayTutorial.md
index 08aa6df8047..a851fe2aafe 100644
--- docs/tutorials/gatewayTutorial.md
+++ docs/tutorials/gatewayTutorial.md
@@ -120,59 +120,66 @@
 
 ---
 ### Using the search box
 
 <div class="row">
 <div class="col-md-6">
 
 The search box allows users to find genome assemblies by entering different types of queries:
 
 Searching by **species name**: Ovis aries
 
 Searching by  **common name**: dog
 
 Searching by  **GC accession number**: GCF_016699485.2
 
+Results are grouped by source. Assemblies listed under **UCSC Genome Browser assemblies** are
+the long-standing browsers with tracks curated by UCSC. Those under **UCSC GenArk** come from
+NCBI GenBank and RefSeq and are served as assembly hubs. There are hundreds of thousands of
+GenArk assemblies, which is why the search box, rather than the species tree, is now the way
+to reach most genomes.
 
 </div>
 <div class="col-md-6">
 
 ```image
 src=/images/tutorialImages/searchByGCFid.gif
 width=100%
 ```
 
 
 </div>
 </div>
 ---
 
 ### Exploring the UCSC Species Tree
 
 <div class="row">
 <div class="col-md-6">
 
 ```image
 src=/images/tutorialImages/speciesTree.png
 width=60%
 ```
 
 </div>
 <div class="col-md-6">
 
-The **Species Tree** option displays a phylogenetic tree that can be navigated using scrolling or
-by clicking different parts of the tree. Hovering over a branch will reveal the lineage branch name.
+The phylogenetic species tree is no longer shown by default; the **Browse/Select Species** column
+now lists your **Recent Genomes** instead. Click **Show species tree** to display the tree. You can
+scroll it or click different parts to move around, and hovering over a branch reveals the lineage
+branch name.
 
 **Note**: The Species Tree does not include all available Genome Browser assemblies. The process of
 adding Genome Browsers has been streamlined, enabling rapid releases but omitting certain previous
 features, such as inclusion in the Species Tree. To find a specific assembly, use the assembly
 search box.
 </div>
 </div>
 ---
 
 ### Requesting an Assembly
 
 <div class="row">
 <div class="col-md-6">
 
 If a desired assembly is not listed, you can request it by clicking **&quot;Unable to find a