Hot do do Level instance preview in editor

I have an actor that at beginning play is spawning a level instance with world transform of set actor. I’d like to adjust this level postion with preview so i don’t have to starting game every time im adjusting a little. I tried to put loadlevelinstance into construction script, it loads the level but it’s not visible in editor, even when i set shoudlbevisible to true. Best way would be maybe to create a level static mesh and destroy it at begin play. Is there a way to transform landscape heightmap into static mesh? Is there any other way to preview level instance in editor? Thanks.