In the sketch project, there is another option called intersect. In the previous video, we have seen that we had selected this plane as a sketching plane. Now, this sketching plane does not have any of these features projected onto this plane. Now, suppose if I had the sketching plane as this face, you can see that I already have some lines on this plane. So, these can be projected using intersect option they can also be projected using project option, but this feature the second one which you see here intersect will help us in projecting the lines which already exist on the sketching plane. So, if you see if I'm selecting this as my sketching plane, you can see that this circle and this rectangle are only the existing things that can easily be projected onto that face using the intersect option.

I'm selecting this plane as my sketching plane, I can directly go to intersect option. I can select the body and you can see all at a time. All the existing entities which are already present on the sketching plane are intersected