Most of the settings are available in the ingame ACE Settings dialog (available in the ESC-menu when in a mission),
some settings are left in ..\ArmA2\userconfig\ACE
You can access the ingame settings menu from within the ESC-menu, while inside a mission. ...
Mission Makers
Viewdistance and Terraingrid is disabled by default, has to be enabled by the mission maker with- ace_settings_enable_vd_change = true
- ace_settings_enable_tg_change =