About Creating a Draft Grid
Using commands in the GRID MODIFY menu (Click > 
Draft Grid on the menu bar OR click > Draft Grid on the menu bar), you can create two types of draft grids in a drawing: Cartesian and Polar. The system creates a Cartesian grid by locating points on a plane, measuring their distance from either of two intersecting straight-line axes along a line parallel to the other axis. It creates a Polar grid by locating points in a plane, measuring their distance from a fixed point on a line and the angle this line makes with a fixed line. To change from one type to another, choose Type from the GRID MODIFY menu.
Draft Grid on the menu bar OR click > Draft Grid on the menu bar), you can create two types of draft grids in a drawing: Cartesian and Polar. The system creates a Cartesian grid by locating points on a plane, measuring their distance from either of two intersecting straight-line axes along a line parallel to the other axis. It creates a Polar grid by locating points in a plane, measuring their distance from a fixed point on a line and the angle this line makes with a fixed line. To change from one type to another, choose Type from the GRID MODIFY menu.When using a two-dimensional draft grid in a drawing, keep in mind the following.
• The grid snap falls on the grid lines when grid snap is on (set in the Environment dialog box).
• The grid origin and angle affect the coordinate values specified for geometry points. The x-axis is always along one direction of the grid, while the y-axis is along the other.
• The grid origin affects the coordinate values appearing in the message area when sketching.
• If you use the GET SELECT menu to select an entity, the entity does not snap to grid.