Being able to set transparency for Colors. RGBA or equivalent is extremely critical visualization tool. This is very helpful when you want to layer visualizations on top of each other. Ex. Layer an image on top of a text box. Layer different parts of an area chart. Layer a combo chart. This is a basic
Totally agree. As far as the line and clustered column vis is concerned I'm looking at a chart with a dual y axis and the only way of correcting this is to bring the line in to make my budget at the same scale as the actuals. If I could just have a colour that was nondescript (or invisible) this would solve my problem.
Transparency is really needed - especially for stacked area charts. Otherwise the features of BI are lost because the charting cannot result in clean output