Add section on model choice to guide

src/gui/options/stableDiffusionInstallationGuide.js

@@ -38,7 +38,9 @@ Stable Diffusion is an AI model for generating images given a text prompt. Autom
 <pre><code>set COMMANDLINE_ARGS=--medvram --no-half-vae --listen --port=7860 --api --cors-allow-origins *</code></pre>
 
 <h2>6. Running the WebUI</h2>
-<p>Now you can run the WebUI by executing either <code>webui.sh</code> (Linux/Mac) or <code>webui.bat</code> (Windows). Note that the WebUI server needs to be running the whole time you're using it.</p>
+<p>Now you can run the WebUI by executing either <code>webui.sh</code> (Linux/Mac) or <code>webui.bat</code> (Windows). Note that the WebUI server needs to be running the whole time you're using it.
+
+Once it's running, open your browser and go to <code>localhost:7860</code>. The WebUI should open. In the top left is a dropdown for model selection, pick MajicMix in that dropdown.</p>
 
 <h2>7. Check it works</h2>
 <p>At this point, if you go to a slave's detail page their image should load after a short (<30 seconds) delay. If it doesn't seem to be working, have a look at the terminal window running Automatic1111's Stable Diffusion WebUI to see if there are any errors.</p>