Step 1: Enable session management
...
On Magento Backend > Goto POS > Under Admin > click on Settings
...
Enable Manage Session (under Session Management tab)
...
...
...
In case you want POS users to sell products immediately without opening a session, disable Manage Session.
For addition settings:
Cash Control: Enable this option to track all cash denominations in your cash drawer at the beginning and end of a session.
View session history since: Display list of sessions during the period you selected.
Step 3: Assign additional permission for POS users
When you’ve enabled POS session, all users can open and close session. However, you can set up additional permissions if necessary.
To set up permissions for sessions, go to POS > Manage Roles
...
Create a new role or edit an existing role. In Permission tab, under Role Resources > Resource Access: Select Custom
...
Make adjustment: User can put money in and take money out during a session.
View sessions created by other staff: When viewing session history of a POS, this user can view sessions created by other users.
Go to POS > Manage Staffs:
...
Select a staff and go to POS permission:
...
Assign the correct Role for that staff and save your settings.
Step 4: Check your settings
Log in to your POS checkout screen to make sure everything’s set up correctly.
Enable Session Management:
Users can see Session Management in the left menu:
...
They can open a new session and input the opening balance:
...
Enable Cash Control:
When opening or closing a session, POS user can input different denominations:
...
Assign addition permissions for POS users:
POS use can make adjustment during a session:
...