Just use the hotkey shift+F10. This toggles between Image editor and UV editor. You can also goto preferences(F4 or edit menu->Preferences. In 4.x ctrl+comma) Click navigation on the left. Then under Zoom panel check zoom to mouse positon. This way when you zoom(Mouse wheel, Ctrl+Middle mouse button) it will zoom based on where the mouse cursor is. Also don’t forget about Fractional zoom. Numpad is 1:1. Ctrl+Numpad 2/4/8. This uses the center of the view. Hope that helps.
