To Edit Default Dimensional Tolerances
To modify assembly tolerance values:
1. In an open assembly, display default dimension tolerances for the top-level assembly.
2. Right-click a feature in the Model Tree and choose 
from the shortcut menu. The feature dimensions are displayed, including tolerances.
from the shortcut menu. The feature dimensions are displayed, including tolerances.3. Double-click a tolerance in the lower-right corner of the graphics window and enter a new value.
To modify component tolerance values:
1. In an open assembly, select a component in the Model Tree or graphics window, right-click and choose 
from the shortcut menu. The tolerance values displayed are for the selected component.
from the shortcut menu. The tolerance values displayed are for the selected component.2. Right-click a feature in the Model Tree and choose from the shortcut menu, or double-click a feature in the graphics window. Feature dimensions display including tolerances.
from the shortcut menu, or double-click a feature in the graphics window. Feature dimensions display including tolerances.3. Select a tolerance from the display of tolerance values in the lower right corner of the graphics window and enter a new value. When you exit from this menu, or when accessed from other operations such as redefine, Suppress, or Resume, the tolerance values switch back to those of the assembly level. The modified values exist, but the values displayed are those of the assembly level.