an annotative hatch is a hatch that automatically adjusts its scale and size to match the viewport scale. This means that the hatch pattern will look the same regardless of how you zoom in or out of the viewport.
To create an annotative hatch, you need to:
* Set the annotation scale tool to 1:1
* Create your hatch as usual
* In the properties palette, make the hatch annotative
* Add annotation scales to the hatch as needed
This will create a hatch that displays correctly at different viewport scales.
https://forums.autodesk.com/t5/autocad-forum/annotative-hatch/td-p/2651268