I need a custom sized drawing area (about 1000cm x 90cm). I've read the help and the diagram studio manual and tried changing the dimensions on ".dgr" file but haven't had success. Is there a way to achieve this?
Second:
The TDiagramBlocks don't have linking points by default. If I'm using a TDiagramToolbar and a TatDiagram and I want to link to blocks, how would I achieve this? I only see linking points in the Flowchart components, but not in the generic TDiagramBlock. Is this only achievable programmatically?
I've been able to create diagrams on architectural-size paper (like 2 ft x 3 ft) by changing the printer to a pdf-driver type ( like the free version of pdf995.com), and then creating a custom paper size.
Yes, that's an option. You can also use PageSettings property and change page size there using the properties available.
About the link points, you can just add link points to the block by using LinkPoints property. TDiagramBlock is a very generic-purpose block, so link points must be manually configured.