No chart transparency in Numbers!

Thanks for the quick response. I did not import the chart. I created it from scratch. The data was from a simple CSV sheet which I opened in Numbers. It is odd behavior.

Any thoughts would be appreciated!

Also, if I copy and paste it into Keynote, the chart formatting is preserved (and the transparency is still not functioning). Interestingly, if I change the chart style to a default style (in the Chart Styles selection panel). Then the transparency returns but with a complete different chart style.

So something about the original charts I created makes it impossible to make the background transparent. My workaround is to select a new Chart style (that does have transparency in the background) and then painstakingly adjusted it to look like my original chart. Transparency is preserved that way.

I'm still stumped, though. What would make a chart not be transparent?

That is correct. No Background Fill selected under the Chart tab. And the background appears solid white. The weird thing is that if I drag the chart over the table where the data is, the highlighting in the column that is the data source shows through the background, but the table itself, and the numbers don't. It is an unusual effect and must be a bug. I'll report it. Probably just some sort of glitch related to charts.