Welcome.
If you will need to attach any file read this:
I am using Plot - SVG (Fabrication Outputs - Gerber and selecting format as SVG is the same) to get SVG pictures like you can see at the end of my old post:
In past (V5, V6, V7?) to get such picture I had to plot separate layers and combine them with inkscape but now (V8) you can get such pictures directly from KiCad.
I use these pictures in our documentation made with LibreOffice. You can there insert as many pictures at one page as you wish and in what scale you wish (these are vector graphic files).
Some additional information you can find reading my feature request: