This AutoCAD Beginners Video Tutorial describes the dimension concept in detail. It show how to create Linear, Aligned, Arc Length, Ordinate, Radius, Jogged Radius, Diameter, Angular, Baseline, Continue dimensions. It also shows how to use Dimension Space, Dimension Break, Tolerance, Center Mark, Inspection, Jogged Linear, Dimension Edit, Dimension Text Edit commands. Multileader, Add leader, Remove Leader is also shown.
Geometric Tolerance creation process has been shown in detail with datum creation, Control Frame creation, & using multi-leader to connect it to reference object.
Some of the important Dimension Style settings are explain in detail.