1Setting option: help (no value) 2See docs/changes/index.html for recent updates. 3See docs/faq.html for problems. 4See docs/manualpages/index.html for help. 5 -version: prints PETSc version 6 -help intro: prints example description and PETSc version, and exits 7 -help: prints example description, PETSc version, and available options for used routines 8-help 9