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nUI has a built in ability to create vertical health and power bars as well as horizontal... plus the bars can all grow from left to right, right to left, top to bottom, bottom to top or outside to center.
He is using the ability to do vertical bars that grow from the bottom. Look at the ["Health"] section in the [ Interface > nUI > Layouts > HUDLayouts > {hud mode} > nUI_HUDSkin_{hud mode}_Player.lua ] configuration file for an example of how it is done. Pay attention to the bar = {} section in particular. The orient = "BOTTOM" option means that the bar grows vertically up from the bottom of the bar. The texture and overlay fields are the graphics used to display the bar background and "transparent" overlay, respectively. The min_offset and max_offset specify how from from the bottom of the graphic the actual bar starts and ends.
So, I presume he created a custom graphic to replace the one that I created for the HUD and then changed the min and max offsets them moved the bars down closer to the dashboard.
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