Not responding means that it’s busy doing something.
Given that this is a 300mb layout file, I guess it simply hasn’t finished exporting.
If you look at the windows task manager you will see layout is still using the CPU, so it’s still working.
There is a new setting under document settings : rendering which overrides your raster viewports in favor of the hybrid rendering.
This will take (much) longer, so turn it off if you want that option/quality setting.
on the first page, it’s linked to a file from may
on the second page, it’s linked to a file from novembre.
I poked inside your files, big textures, massive amount of lines, due to the topography.
I’m talking 19,6 million lines and 9,7 million faces.
I tried to export by default, it crashed. I turned off the hybrid rendering as Adam mentioned, it exported in like 30 sec.
Hybrid rendering renders twice, once as raster, without lines (easy), then on top of it, vector lines. My guess is, layout has to render 19,6 million lines on each page to show them in hybrid.
your pdf is a but heavy, 40 mb for two A1 pages, because of the big raster images. nothing alarming though
and despite the high ply count, and a handful of big textures (8-10 on each file), it’s rather clean. So yeah, it’s the hybrid override kicking you in the shins.