Pressing Compile Solution button in VSdocman dialog causes that every VB, C# or ASP project in the solution is compiled with its own settings. It acs exactly as thought you compiled them separately step-by-step.
In addition to project documentation, VSdocman generates one master documentation in every project's output folder. Master documentation includes all project documentation in the group and its name is Solution+. It doesn't physically contain all project's documentation. It only references them depending on output format. So you can freely make changes to sub-documents without the need of change master document. This is extremely useful in distributed team work. All sub documents are exactly the same as if generated for single project.
It is necessary that all projects are set to produce documentation of the same format (HxS, CHM, HTML, RTF or other).
So you have several projects, every generated its master document. You only need one of them because they are all the same, others can be deleted. Click here to learn how to view and deploy solution documentation.
Pressing Compile Solution to Single Documentation button in VSdocman dialog causes that every VB, C# or ASP project in the solution is compiled into one resulting documentation.
Settings such as output type, output path, title page text, footer, external files folder, show forms under separate category, show inherited members and file naming format are taken from current project and will apply to whole documentation. If none of your projects has suitable settings, you can create dummy empty project where you set all those VSdocman settings and use it only for compiling single solution documentation.
This kind of documentation is suitable if your projects share namespaces and you need one unified documentation for all of them. All members from the same namespace are merged.
How to compile single project | View and Deploy Solution Documentation