What should I do if I want to change logo?

Do you mean this:

It is in the documentation for replacing the banner heading.

Hi @YZ_10818805 ,

I agree with the information provided by @TomU to you, just in case, you can't review the technical articles. I pasted them out

Change logo:

1. Backup and replace <WT_HOME>\codebase\wtcore\images\bblks\l_ptc_splash.gif (Windchill 10.1) or l_ptc_splash.png (Windchill 10.2) with the desired image file
2. Delete the browser cache
   • In Internet Explorer, uncheck the option "Preserve Favorites website data" when deleting the cache ("Delete Browsing History" dialog)

Additional Information:

• The same image path is also referenced in <WT_HOME>\Windchill\bin\HomePage.html, but overriding this value here has no effect
• Animated GIFs may or may not work depending on the specific browser (the browser handles the display of these, not Windchill code)

Logo display time:

• Adjusting splash screen display time can be done by increasing setTimeout to a higher value in the Windchill/codebase/index.html:

  <script type="text/javascript">
  
  setTimeout('PTC.console.setConsoleInterval(http://<hostname>/Windchill/app/#ptc1/object/checkConsole)',3000);
  
   function eventManagerConsole(event)