POS after press complete order , reset window and be ready for next customer

Thanks for suggestion, Andre!
Are you talking about auto-open option for POS window? Am I right ?

Right now you have 2 options -
1 - create order without window hiding
2 - create order with hide option after printing

As a quick decision - you'll be able to use option 1 and print all orders as selected orders - see screenshots,

here it is vidoe example - http://screencast.com/t/BCkGqPJ2S
For var.2 You'll be able to sava invoice as PDF or print it.
After that POS window will be hidden by Store Manager on Exit

Hello Andre!
According to your question - directly:
Right now when F12 was pressed by you - new modal window will be shown with question: "Cancel order and POS"
Really, before F12 print order will be created by pos in Background.
When you click on Yes Cancel - POS window will be closed but order will be created in this case.
It looks misunderstood in tthe text of itle.
This fix was added to our current development plan.
I hope this problem will be solved soon.

There are 2 variants here for auto-hide window.
to give option to choose how to operate with window according to you preferences
var-1 - check box with autosave method with option - Autohide window - yes\ no
var 2 - Preference window - Advanced option - with POS setting - don't close POS after creation - yes \ no

Well, I've got meeting with our development team about this implementation.
It's better to implement the following veriant.
2 buttons on POS window.
button 1 - Create order and close - ( it was before)
button 2 - Create order - ( new button. You'll create order but POS window will be stay on top all time and ready for next order)

I guess this variant is easy understand :-)

Here it is mockup - see screenshot.

Please note, I'm afraid we'll not be able to implement in the current Release.
According to our Development plan we are working on import of orders in Magento Store Manager.
I'll be able to update this suggestion after official Release. :-)

Hello Andre!
I'm not familiar with your client's POS.
It's hard to compare those products for me.

But I recommend to use direct connection for POS operation.
What's the difference - read this article - https://support.emagicone.com/231099-Database-connection-Direct-Bridge-Direct-Connection-through-HTTP-Tunnel-What-is-the-difference

and one more - https://www.mag-manager.com/useful-articles/quick-start-guide/php-mysql-bridge-connection-settings/

It's better to use bridge connection if you need to operate with huge amount of information (large product import , modification of products in bulk)

You'll be able to run POS for 3 PC. It's better to have direct connection to synchronize current data.
It's bad practice to use bridge connection for such example. In this case you need to synchronize data every time.

So, I recommend direct connection only.

Please note, you need to buy additional license for 1 PCs - https://www.mag-manager.com/order/

You'll get Bundle when Magneto PRO version of Store Manager was purchased (Primary License + Additional license)
So we have
1+1 = bundle
1 Additional license.
------
3 licenses

You've asked : "it has 12 Thousand products."

It's not so huge amount for Store Manager operation. :-)