An alternative would be to create a special Display Mode. Copy the “shaded” mode and alter the color of the surface edges (tab “objects” > surfaces, set “edge color usage” to “use single color for all edges”). Change the edge thickness as required (tab “general” > Surface edge settings).
Draw your arrow as a single surface, and change the display to the new mode with
It has its advantages and disadvantages. In Perspective view, when the arrow is in the distance, the edges will more or less “swallow” the surface. But on the other hand, the white margin that you are seeking will be present at any viewing angle. See what you prefer.
Edit: This method seems to work on screen. As soon as you open the printing interface, the white borders are gone. I tried Layouts, even set the object display mode again to the new display mode, but to no avail.
Maybe @dan or someone else at McNeel can have a look at this . I am currently not able to make screenshots (unless somebody can tell me how on my wife’s MacBook).
Edit 2: I found the way to make screenshots.
As I see it on the Layout page:
As it appears in the print preview:
settings of the display mode used on the arrow:
Edit 3: Maybe the issue I raised has already been resolved, I am still using 5C262 on this laptop, and my internet access is limited so I cannot download the latest WIP right now.
Edit 4: I did check with the latest WIP, no change. I finally realized that it is the same issue I raised before (duh…), THIS. It seems to be slated for version 6, so not anytime soon I guess.