Check out this video that shows where to find the tutorials in SolidWorks on DimXpert and TolAnalyst. DimXpert allows you to create dimensions in your part documents that can be brought into your drawings faster which will save you time when creating drawings. The dimensions created also include tolerances which are necessary for the manufacturing process. Also, DimXpert can be used with TolAnalyst to analyze the buildup of tolerances in an assembly and where there could be possible interference. I hope these tutorials can help you in your creation of dimensions and tolerances as well as your analysis of these tolerances within part and assemblies.