gizmo troubles

I exported data.raw from one level, quit that project and opened the project I"m working on.

I opened data.raw into heightmap field in import -export gizmo, sized gizmo to match, and then clicked ‘import’, and instead of data.raw being the section I selected and exported, it seems to be the whole terrain itself , squished into the gizmo area.

What am I missing ( I’ve read docs already) to only export the ‘gizmo’ data , not entire terrain?

Wanted to ad, that I used the ‘brush’ to select area I wanted,copied to gizmo inlcuding ‘height’ selection, and exported to data. raw, but its definitely not the right shape at all.

Also, I’m using 4.10 to copy FROm, and going to copy into 4.11 project.

thx

THanks for anyone considering a reply, though it seems I finally got it figured out.

As docs indicate a bit of trial and error is in order due to raw format size info, so doing that and increasing size of gizmo did the trick.