Why not have one zoom tool like Photoshop. You can drag the Zoom(Z) tool over ANY area of an image and it will zoom to that point and then a full zoom out would be the shortcut Ctrl>0 Only 2 clicks. I could do anything in milliseconds with that capability. I bet you could do this when you're fixing the Spectral view in a Photoshop file.
With one zoom tool it would totally do away with the whole zoom box but leave it in the window menu in case somebody yaps 'cos it's missing :D
BTW, don't forget to include it in Edit view as well.
I more or less do that now with a keyboard short cut to View Zoom to Selection. Then I just select the bit I want to zoom to by dragging the left clicked mouse over it and then use the shortcut key. The already assigned "\" key zooms back out fully horizontally.