I'm designing layout for an embedded device which (after taking in account not rectangular pixels - in 2023) has a resolution of 860×480px.
And this is fine, since I can set the page size at 860×480px. However, for reasons, I also need to use mm, and I determined the panel is about 145dpi
The issue is that Inkscape (at least 1.3) is fixed on the 96dpi SVG standard so if I switch the ruler units the results has no sense.
If I set the viewbox/scale I could configure the user unit as whatever I want but it seems to be no way to use user unit in the ruler or anywhere else.
Am I missing something or DPI different than 96 are simply not possible on Inkscape?
Clarification: I will need to export as bitmap (in 860x480) but the design has part that have significance in millimeters (for example text size) and other that are significant in pixel (like coordinates). In gimp you can simply switch ruler unit but inkscape is fixed (by design) with the CSS interpretation of pixel.