Seat Reservation

You don’t need any seat reservation from Bruges to Amsterdam. Avoid to travel with the Eurostar, you have also hourly Eurocity Direct trains from Brussels, with a change at Schiphol Airport. You will spare reservation fees and be fully flexible.

I'm not sure what you mean by "print passes in Austria”. If you already have your pass, then there's nothing to print. ÖBB don't sell Eurostar reservations and the other trains don't have reservations.

​@Scott Messemer Apart from Eurostar, which is a waste of money for this journey, seat reservation are not possible on the trains on this route. 

Thank you everyone for all the great information. Sorry when I said ticket and not seat reservation.   When I was looking at trains for this journey, all I saw were seat reservations required.  See Below.

  Also On OBB website, I thought I was just buying a seat reservation, but maybe its a ticket?  But it did say only printable in Austria?

We purchased a 4 day Eurail pass, but have 5 days of train travel.  I was thinking we could buy one of our tickets local at train station and save some money.  
Out Journeys are:

Venice - Como (this is the one I hope to purchase locally)

Como - Zermatt

Zermatt - Luxemburge

Luxemburge - Bruges

Bruges - Amsterdame

You can avoid this by clicking “No seat reservations” on the search page, and it will show you the route avoiding these expensive reservations. It takes roughly the same amount if time, and costs nothing.

It will be Bruges to Brussels Midi, and Brussels Midi to Amsterdam Zuid.

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On your other routes, yes you can buy Venice to Como separately. It’s wise to buy the Venice-Milan train in advance if you can, as it will be a lot cheaper. You can do this direct from Trenitalia, or from an agent such as Italiarail.

Your pass is your ticket. You don't need to buy any other tickets for trains included in your pass.

If you have 5 travel days, then you can cover all those journeys with your pass. You can also do all of them without reservations.

Edit: I now see you have a 4-day, not a 5-day pass.

Luxembourg-Bruges can also be quite cheap as a single ticket. Price depends on your age and whether you have a Train+ card. That card also exist as a 1-month version can amortise in just 1 journey. You an buy Luxembourg-Bruges here.

The fastest journeys are with expensive Eurostar reservations. Slightly slower journeys are without reservations.

That will be a ticket. As I wrote, ÖBB can't sell Eurostar reservations and the other trains don't have reservations, so I suspect your screenshot shows a ticket.