I have several subreports on a report, and each one has a bold line around it - I think 1pt. How can I reduce this to hairline or remove it? I have looked at the subreport properties and don't see this option.
When you put a report (subreport) on another report it is treated as just another control on the report - think of it as a container to hold the subreport. This control has properties such as the master/child links as well as the border you speak of and are are quite different to the properties of the subreport itself.
There are several ways to select the properties for control. I find just clicking on the edge of the control will select the control (rather than the subreport). If you have selected the control you will see the handles appear round the control. Then you can open the properties window e.g. by clicking on the properties icon.