Custom Captions? Need transparency!
I wanted to create cutom captions for labelling images, but unfortunately I did not get them completely transparent.
This is what I want: a short, thick vertical line, which must keep it´s size, a 2px horizontal line which must be scalable, underneath text in variable size.

And this is what I get in Captivate:

I´ve added a grey background color to the project, so you can see that the caption box ist not completely transparent.
My problem is, no matter what color the upper first left pixel has and not matter which color is set for any other pixel (except the darkgrey lines), there´s always a opaque area in the center of the caption box. This might be OK, if the label is only a single word or text line as shown, but it will get difficult with multiple lines in the label.
How can I get a transparent label? Or is it possible to create this with a custom smartshape instead of a caption?
I´m working with CPT 9, publishing in HTML5, responsive project.
