I am using Inkscape 1.4 (86a8ad7, 2024-10-11) on Windows 11.

I have an A4 page of 6 "This Way Up" labels that I've created. Each label is made up of two up arrows, a thick horizontal red line and the text THIS WAY UP grouped together. The 6 labels are not grouped together but separate on the page.

I select one of the labels (I want crop marks around each label so just trying to get one to work first of all) then select Extension -> Document -> Layout -> Printing Marks.

I ensure Crop Marks are selected in the Marks tab and in the Positioning tab I choose "Set crop marks to: Selection" and have 5mm set for Offset and Bleed Margins.

The lower right crop mark (1) is perfect vertically but horizontally it's flush with the right hand edge of the selection rather than being offset 5mm, so it's not where I want it.

The lower left crop mark (2) appears about one label width further left than it should be. The top crop marks (3) and (4) are waaaay up the page above the label, about four label heights higher than they should be.

Am I doing something wrong? Is it a bug?

I think this is an error caused by transforms on the layer in which the object reside.

Create a new layer.

Select all, copy, then paste>paste in place.

Try again - it might solve it.

Thanks for the suggestion. I tried this and unfortunately it didn't resolve the issue.

I did however notice a "rogue" text element which shouldn't have been there (while looking at the XML) so I deleted that as it was unnecessary. Fingers-crossed I tried again but still exactly the same issue.

I also tried removing all but one of the labels (there are actually 6 on the page) and tried various combinations of grouped and ungrouped elements and again, still having the same issue.

Removing all the elements one by one still fails to produce Printing Marks in the right place.

The only "almost" success I had was adding a simple rectangle behind the label elements to represent the boundary of the label, selecting that and adding Printing Marks. I say "almost" success because it still didn't add the 5mm offset I'd set.

The only thing that seems to work for Printing Marks with me is setting the crop marks to the Canvas. These are positioned as I'd expect.