The Functional Tolerancing and Annotation (FT&A) workbench is a great way to add 2D drawing information right into the 3D model.
These Boolean operations work very similar to the ones used in the Part Design workbench for when a designer has multiple bodies.
Have you ever had a model that was imported in as an isolated model?
Generally a comparison is performed on the part when it was early planning to the same part that was released into mass production.
The distance and band analysis is a great function to measure the minimum distance or to see if your product is meeting a minimum and maximum distance requirement.
Kinematics works great when you have multiple parts moving/pushing other parts in a product.
Corners can be tricky when adding them into a sketch or wireframe. Adding them the right way can make your model more robust and predictable when modifications are made.
An easy way to change your toolbar from vertical to horizontal is by dragging the toolbar and selecting the shift key from your keyboard.
Typically you can modify the links or change the overload properties. The point of CATIA V5 is to have a fully updatable drawing.