Not being able to see what you want, you mentioned a black line so... why don't you use an outer border of .01 with a black color?  For example, let's say your existing white border is 1/4 inch.  Keep your inner border set to .25 with a color of white and your outer border to .01 with a color of black.  That way you'll get a thin black line around the whole thing.  If you want to get more complicated than that and do something like a frame, you could add a cutout in the image editor.

Mike

Do you have a video for this? If not I have a simple white border around my photo now how do I make it look like a bevel so it looks like a real matt?

All of these can be done with either photo mats, borders, or a combination of both.  Do you have an example of what you want to do?  Then I could better guide you to which feature is most appropriate.

Regards,
Mike

Is there a way to give the photo mat a bevelled look? Also adding just a black line around the image or is this more a affinity photo or photoshop process?

Click the units (in/mm) button on the top menu.



Regards,
Mike

Thank you. I didn't change it. How to recover mm or cm?

Looks like you are trying to set a 10 inch border which is not possible.  Choose a smaller border.

Regards,
Mike

Since the last update it is impossible to set borders. How to deal it?

ok thanks Mike

Qimage doesn't recognize printers in such a way: that is deferred to Windows.  Like Photoshop, Lightroom, Affinity, and all other Windows software that is not RIP based, it relies on the Windows printer driver.  So if you install a Windows driver for the printer, Qimage will automatically see it (through Windows).  If there is no Windows driver available, you cannot use Qimage to print to that printer.

Regards,
Mike