Can you resize a texture in Unreal Engine 4 instead of photoshop?

We’re trying to cut down the size of our game and wanted to reduce every texture to 512x512. Is this possible to do in UE4? I know there’s a texture editor and i’ve checked it out but I can’t find a resize button. Do I need to scale down the imagine in photoshop and reimport it?

Thanks

You can set a max size in the texture editor.