Am 28.12.2020 um 02:03 schrieb Mattias Gaertner via lazarus: > What package opens hh.exe in Lazarus? No special package needed. As I described in https://wiki.freepascal.org/Installing_Help_in_the_IDE#Installing_CHM_help_.28Lazarus_1.0_and_later.29, hh.exe (the Windows help viewer) can be made to display the chm files instead of lhelp.