.. _method-optpp_cg-max_step:

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max_step
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Max change in design point


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**Specification**

- *Alias:* None

- *Arguments:* REAL

- *Default:* 1000.


**Description**


The ``max_step`` control specifies the maximum step that can be taken
when computing a change in the current design point (e.g., limiting
the Newton step computed from current gradient and Hessian
information). It is equivalent to a move limit or a maximum trust
region size. The ``gradient_tolerance`` control defines the threshold
value on the L2 norm of the objective function gradient that indicates
convergence to an unconstrained minimum (no active constraints). The
``gradient_tolerance`` control is defined for all gradient-based
optimizers.


