I’m not sure if I understood you correctly. Therefore, I will show how to make buttons for spawning a Static Mesh Actor with predefined parameters. I hope this helps.
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Make a template button widget with needed data variables.
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Make a controlling widget, place template buttons, and set data variables.
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Add events for spawning.
A slightly different approach is required if you want to change materials, static meshes, or the position of existing actors. However, I still don’t understand what exactly you want to do.