I've been using Visio since before Microsoft bought them, and I love Visio 2010, but the Microsoft Office help is worthless! Every dialog has a "context-sensitive" help button with a little question mark on it, but - psyche! - it always opens to the main Visio help page.
Why not just search? Great idea! Try searching the Visio 2010 help for, oh, I don't know, something fundamental to Visio, like glue. Here's what you get:
Can you guess which of the six results actually explains what "gluing" is? If you said "Number 4", you cheated and looked.
Anyway, if suddenly the "Database" tab disappears (assuming you figured out that you must use the "Database Model Diagram" template to get the tab to show up in the first place), be sure that this checkbox in Visio Options is checked:
Hopefully this will help someone else out.
