When editing feature line levels, the best practice is to use the grading feature line tools, such as the Level Editor, which provides reliable controls for incrementally raising or lowering an entire line or specified points. AutoCAD commands, such as MOVE and OSNAP, can give undesirable results unless used carefully. For example, an accidental OSNAP to an object at level 0 will set the level to 0. However, you can use the AutoCAD MOVE command to move a feature line horizontally.