Head into the customers CRM section of trims. In here you can filter your customers to generate a list you require. for more information on filtering CRM customers, please see https://youtu.be/aBK4SvylrjA


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Select all the customers (ctrl a) and right click them. You will see the option to create  a list. 

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Any of your lists can be sent to fuse by right clicking and selecting send to fuse.