Thank you for your response Mike. Unfortunately, I somehow ended up with a solid black bar being printed at the bottom of the page. I will have to reset the settings and try it out again.

Hi,

I have just downloaded the Qimage Ultimate demo software to see if this is going to help me create Giclee prints.
I have a Canon Pro10S printer and am a total newbie to all of this...

I hope to sell primarily A5 format prints. As it is not possible to get a type of Canson paper that I like in A5 format, I have to buy it in A4 format.

I am trying to get around this issue by creating a file where I place 2 identical images on an A4 document, calculating exactly the same white border to be around the image and then cutting it into two A5 prints. I am printing in portrait mode.
The trouble is that I am not getting identical margins on the prints (L,R and T).

Rather than wasting more expensive paper, just wondering if this is the correct way of doing this, or if I am going wrong somewhere:

I am circumventing the 30mm margin on art paper enforced by the Canon printer, by selecting a Matte Photo Paper and used the following settings:

Ticked "prevent paper abrasion" in print settings.
Disable overspray and print expansion
Select borderless printing (I do have a 1.5cm white border around the image) (see attached image where red indicates where the white border is going to be)

The quality of the print is excellent, but the margins are off.

Looking at the page margins I can see the option "center on physical page", but margins L/R are different to T/B.  
I get 0.1967 and 0.2 for top and bottom and 0.1333 and 0.1350 respectively for left and right.

Even if I were to cut the paper to A5 format, I would still have differing L/R to T/B margins.  

The aim is to have the same margins at the top, left and right for each A5 area.

Can anyone shed any light on how I can resolve this.

Many thanks in advance.

Kind regards

Bea