Search for multiple file types Windows Explorer

Steps to search for multiple file types at once in Windows 10 Explorer.
This search finds all Excel, Word or Powerpoint files in a folder or drive:
ext: xls OR ext: doc OR ext: ppt

[@MichaelRogersJesusrules]

Thank you kind Sir . much appreceated .from south australia xo :) God Bless

[@Singhmodz]

Thanks.