--- title: How to add strategy constraints --- :::info Availability Before Unleash 4.16, strategy constraints were only available to Unleash Pro and Enterprise users. From 4.16 onwards, they're **available to everyone**. ::: This guide shows you how to add [strategy constraints](../reference/strategy-constraints.md) to your feature toggles via the admin UI. For information on how to interact with strategy constraints from an [Unleash client SDK](../reference/sdks/index.md), visit the specific SDKs documentation or see [the relevant section in the strategy constraints documentation](../reference/strategy-constraints.md#sdks 'strategy constraints documentation, section on interacting with constraints from client SDKs'). ## Prerequisites You'll need to have an existing feature toggle with a defined strategy to add a constraint. The rest of this guide assumes you have a specific strategy that you're working with. ## Step 1: Open the constraints menu {#step-1} On the strategy you're working with, find and select the "edit strategy" button.  On the "edit strategy" screen, select the "add constraint" button to open the constraints menu.  ## Step 2: Add and configure the constraint {#step-2} Refer to [the _constraint structure_ section of the strategy constraints reference](../reference/strategy-constraints.md#constraint-structure) for a thorough explanation of the constraint fields. 1. From the "Context Field" dropdown, **select the context field** you would like to constrain the strategy on and **choose the [constraint operator](../reference/strategy-constraints.md#strategy-constraint-operators)** you want. 2. **Define the values** to use for this constraint. The operator you selected decides whether you can define one or multiple values and what format they can have. 3. **Save the constraint** first.  ## Step 3: Save the strategy {#step-3}  ## How to update existing constraints To update an existing constraint, find the constraint in the "edit strategy" screen and use the constraint's "edit" button. 