When you move the object via the mouse, it only moves within the preset pick grid. If you press the Shift key while you move the object, the pick grid is deactivated. The grid settings to be used when the pick is deactivated can also be preset. Select CAD → Pick Options → Set Pick Grid.
Fig. 252 Pick grid settings – Display Grid
Fig. 253 Pick grid settings – Snap Grid
Fig. 254 Pick grid settings – Angle Pick
Fig. 255 Pick grid settings – Colours of the Pick grids
