:ref:`gmx mdrun` option ``-multidir`` the bias will also be shared across simulations.
Sharing may increase convergence initially, although the starting configurations
can be critical, especially when sharing between many biases.
- Currently, positive group values should start at 1 and increase
- by 1 for each subsequent bias that is shared.
+ Currently, the share value should increase with increasing bias index
+ (or be 0).
.. mdp:: awh1-ndim