Sequences let you organize A/B testing on Email steps. You can create an unlimited number of variants for each Email step. 

Creating a variant
On the Steps tab of your sequence, hover over an Email step and click Add variant.

Cloning, editing, removing an existing variant
Hover over an existing variant and click on the needed action.

Pausing and resuming an existing variant
Sequences let you pause an existing variant or several variants of the Email step. Note that at least one variant must remain active. To pause or resume a variant, hover over it with a mouse cursor and click on the needed action.

Viewing performance of A/B variants
To see how your variants of the Email step perform, open the Stats tab,  scroll down to the Brief/Detailed section and enable the A/B toggle. 

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