Updated README to detail visualizer features

Author: jvm123

README.md

@@ -137,9 +137,21 @@ The script in `scripts/visualize.py` allows you to visualize the evolution tree
 # Install requirements
 pip install -r scripts/requirements.txt
 
-# Start the visualization web server
+# Start the visualization web server and have it watch the examples/ folder
 python scripts/visualizer.py
+
+# Start the visualization web server with a specific checkpoint
+python scripts/visualizer.py --path examples/function_minimization/openevolve_output/checkpoints/checkpoint_100/
 ```
+
+In the visualization UI, you can
+- see the branching of your program evolution in a network visualization, with node radius chosen by the program fitness (= the currently selected metric),
+- see the parent-child relationship of nodes and click through them in the sidebar (use the yellow locator icon in the sidebar to center the node in the graph),
+- select the metric of interest (with the available metric choices depending on your data set),
+- highlight nodes, for example the top score (for the chosen metric) or the MAP-elites members,
+- click nodes to see their code and prompts (if available from the checkpoint data) in a sidebar,
+- in the "Performance" tab, see their selected metric score vs generation in a graph
+
 ![OpenEvolve Visualizer](openevolve-visualizer.png)
 
 ### Docker