Problem
Getting the exact positioning I want is difficult. The options to choose the general location is fine, but fine tuning the position with the "Top" and "Max height" options just doesn't work very well. After trying to get the exact positioning I want for almost an hour, I gave up and disabled it.

Suggestion
A click and drag solution for both position and size would be ideal. A perfect example would be the Advance Chat HUD mod. A showcase of that mod is below. The resizing can be seen in the first 25 seconds of the video.
https://youtu.be/x7h5ykpbsMg

If that's not possible, then replacing the max height, left, and top options with X, Y based positioning for both size and position is another option.

For my RPG-esque modpack I'm putting together, I'm using this to replace the advancement screen. Even without the widget, it's great. The widget itself is good too. Configuring it is the frustrating part.

Update on my suggestion. X, Y values for positioning is fine. Adjusting size values measured in pixels makes much more sense.

Thanks for the feedback. I will look into implemented a feature to just drag and drop the widget.