A little used WEF feature is the comments builder input which appears on all builder editors. The input always displays at the very top under the collapsed group header "Properties" along with the builder enable/disable input. The primary reason it is little used is because the "Properties" group is collapsed by default and therefore not immediately visible. This can be easily changed through these steps:
1) Extract the Base.bdef file from \WebContent\WEB-INF\builders\corebuilders.zip
2) Copy the file to \WebContent\WEB-INF\builders\com\bowstreet\core
3) Edit the highlighted element from true to false
Restart your eclipse workspace and the comments builder input should now be visible by default.
Remember to restart this process when you upgrade to a new version of WEF since this effectively overrides the designer's defaults.