To change the owner, simply go to the deal page. In the top right corner, just select the name of the new owner.

This operation can only be performed by the administrator or the current owner of the deal. The takeover by standard users is not possible.

Also, your deals can be transferred through an automation, triggered by the deal entering a “pipeline stage” and conditions such as geographical location or other field values. For example, you might want the deal to be handled by a colleague for a specific stage of the process.