communication User program interactive communication interaction User program interactive communication inpud devices 3D graphics window interactions dials 3D graphics window interactions dialbox 3D graphics window interactions mouse 3D graphics window interactions keyboard 3D graphics window interactions trouble shooting Mouse trouble shooting picking Mouse trouble shooting shortcuts Keyboard shortcuts: magic of a keyboard touch arrow keys Arrow keys mouse "Depp pages" window dials Dials label window mouse Dials label window menu blocks User menu block communication menu items Using menu items arguments Using menu items history Menu arguments: History list atom Menu arguments: History list list Menu arguments: History list argument Menu arguments: History list selection Menu arguments: Selection keys keys Menu arguments: Selection keys argument Menu arguments: Selection keys active Menu arguments: Selection keys image Menu arguments: Selection keys passive Menu arguments: Selection keys WORK_REFL Menu arguments: Selection keys inquire Menu arguments: inquired variables variables Menu arguments: inquired variables variables Menu arguments: predefined variables WORK_SEGM Menu arguments: predefined variables MAP_2FOFC Menu arguments: predefined variables DEF_ALL Menu arguments: predefined variables