When you installing AppControls / acFormHelp, the FormHelp designer will be installed to the Delphi IDE additionally as new property editor for all "Hint" properties (doubleclick the Hint line in Object Inspector to see the designer).
FormHelp Designer let you to 1. Edit first and secondary part of hint separately, without separating parts by "|" character if FormHelp component was NOT dropped on current form:
2. Edit Hint and Context-sensitive help if FormHelp component has been dropped on current form and you need to describe rich context-sensitive help:
The "FormHelp designer" will overwrite all previously installed editors for the Hint property.