How do I Re-assign a Sales Representative to a Customer?

This functionality is available to the following user roles:

Sales rep can re-assign their customers to other reps, but will lose access once they save.

Open the customer information page for the customer you'd like to re-assign (for help searching a customer, use this guide here).
Scroll drown to find the section field Sales Rep and tap into the carat. A drop-down of all sales reps will appear. Select the correct sales rep.
Scroll to the very bottom and tap Save.

NOTE: You can only reassign proposals to a sales rep that is assigned to the same company as the initial sales rep.