how to change error bar thinkness

[#1]

I am working on the Graph Builder and by mistake I changed the error bars, so that only the top and bottom are visible. The vertical connection line is still there, but very thin. I want to make it the same as the caps. Any ideas how?

[#2]

I'm not completely sure how this happened. In general you can adjust the line with of the complete error bar by right-clicking into the graph => Customize => Error Bar => Line Width

Maybe changing the line width in there helps.