FIGURE 1.6 Default template units selection
The difference between Third and First angle projections can cause parts to be manufactured incorrectly if those reading the prints (or making the prints) do not catch the difference or see that there is some discrepancy. Figure 1.7 demonstrates the difference between the two projection types. Make sure to get the option correct. If someone else, such a computer specialist who is not familiar with mechanical drafting standards, initially sets up SolidWorks on your computer, you will want to verify that the default templates are correct.
FIGURE 1.7 Differences between First (left) and Third (right) angle projections
Notice that the icons in the View Orientation drop down are arranged in a Third Angle projection fashion. This might be confusing for people accustomed to using First Angle.
Another setting affecting projections that you will want to check is found at ToolsOptions, Display/Selection Projection type for four view viewport. This does not follow the dimensioning standard selected for the default templates or the country in which the software is installed.