Before I made an addon to make my tweaks to the default UI, all of the bits were done in macros (moving the right action bars to horizontal in the middle almost took all 255 macro characters). It allowed me to tweak the settings and since I had the macros bound I would just roll my fingers across a bunch of numbers for the changes to take place. Of course I knew eventually it would all become an addon, but for development purposes editing the macro was a little easier than doing the addon and reloading the UI. Plus there is a little fun in hitting the macro button and seeing the UI dance around. :-)
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