These steps does not apply to a Sandbox, you cannot deploy a flow to a Sandbox.
In order to be able to deploy a flow to a Crosser node you first need to have registered your nodes. (Please see Node installation for more information)
To deploy a flow click on the Deploy icon on the flow version you want to deploy. This will open a dialog where you can select the node you want to deploy the flow on. Deploying flows creates a job that the edge node will find and execute the next time it connects to the cloud service.
This means that it may take some time before the action is applied, depending on the polling interval used by the node (default 10 seconds). The status of the deployment is shown in the Nodes panel to the right of the version table. If you don’t see this panel click in the Nodes column on the version you deployed.
This procedure is useful for deploying to a single node. If you want to deploy the same flow to multiple nodes you can do this from the Nodes page. (Please see more on how to deploy to multiple nodes in Node Management)