Entering the 'Edit Integer' window

[matalog]

A little thing that niggles me a lot is when trying to enter the 'Edit Integer' window to convert hex to dec etc, which I often do, I press Shift then press '-'. Most of the time upon first press the calculator will output a # to the home screen.

What causes this, and how can I stop it? Is it possible for me to set up my own shortcut to call the 'Edit Integer' window?