I’ve gone and done it and somehow made the MetaTrader4 Navigator Panel expand across the entire screen. 
Anyone know a way of getting it back to the left side to line up with the Market Watch Panel?
TIA
Click on the navigator panel and drag it, you will see the outline turn into the small box once more, then release the mouse and it will return to it’s small form.
Tried doing that, it only wants to change the size in the up and down direction, but not side to side.
Might be something that needs to be changed in the registry settings.