The gradient ramp UI has got to be almost 20 years old. It is very tedious to use when you want to define a complex gradient with a lot of flags.
Please update the UI.
Make the ramp image itself able to either be zoomed in and out (for careful flag placement) -- or preferably, make it a resizable pop-out window so we can make it much larger on the display. The small Mat Ed dialog is very confining.