Single Selection Mode
Find it here:
MOUS_ICO Menu: Landscape > Setup > Single Selection Mode
MOUS_ICO Toolbar: Setup: Single Selection Mode
Single selection mode makes it possible to select individual objects from a group. This applies to grouped plant symbols, areas with leaders, etc. Use this mode to adjust the placement of leaders in areas made with Land Use Disposal or to adjust single elements in groups of for example plant symbols.
Single selection mode sets the AutoCAD system variable PICSTYLE to '0'. The PICKSTYLE system variable controls the selection of grouped objects and associative hatch patterns and their boundaries. The PICKSTYLE default setting is 1. The function Multiple Selection Mode will restore the setting.