Repeating Printer Crop Marks on Custom Label Layout

I have a custom label layout with a 1” header. Each label is 4” wide and 7” long, in Portrait format, on 22” X 17” paper. (Double-size business cards).

 

I am printing 5 labels across in 2 rows, 10 labels per page.

 

The layout's Header lets me put a Printer’s Crop vertical line at precisely 4” and at precisely 8” at the top. So it places the crop mark for the first and second columns only.

 

My layout doesn’t let me ‘see’ the remaining 3 columns to put in the Crop Marks. The header area for these last 3 columns is greyed out. I can put the Crop mark there, but it doesn’t print.

 

My attached screenshot shows the first two crop marks in the header’s ‘white space’ and the 12” mark for the 3rd crop mark being grey. 

 

As well, although I have a left and right margin, I cannot figure out how to put in crop marks to cut between the two rows.

 

Any thoughts? Even getting just the 3 missing right hand column crop marks in the Header would be helpful.

 

Thanks, David