Imported objects not appearing

I have tried importing 4 objects into my unity scene, all of them are .fbx files and one works correctly.

Ther second one shows the correct item in the preview but when you drag it into the scene nothing shows up, even when you click on the move item there is nothing that can be seen in the scene even though it is in the hierarchy list, is there a keyboard shortcut that ‘jumps to’ the item?

The other items go into the scene in a sense where you can move them, but its like they’re invisible, you cannot see any part of them and Im kind of at a loss at what to do, please could someone help?

Many Thanks

Alex

it may be that it is scaled too small or big, once you have dragged the object in to the engine simply hit the “F” key to jump to it.

thank you, that was very helpful, unfortunately when I went to the item it was about four miles away from where everything else imported for some reason, and it still acting odd when I try to scale it, dow=nt want to co-operate. Is this a bug in Unity or in my import settings?