Arrow keys switching to scenes tab as appose to locking axis

Hi, I’m a bit puzzled and need some guidance! My arrow keys as default locked axis’s. Today for some reason the arrow keys activates the scenes tabs! Really frustrating and have no idea how this has come about. I’m sure I’ve triggered a key that has enabled this by mistake but can’t for the life of me find it. Any advice would be greatly appreciated. Thanks

Try rebooting your computer and restarting SketchUp. Does that fix it?