what exact changes were made on top surface of the screw?

[kingston123]

In this video, from @1:22 to @2:42 he made changes to top surface of the screw. what exact changes were made on top surface of the screw?

I didn't understand clearly.

[MrCATIA]

The teacher in the video does go very fast and it's hard to follow all the steps. In the time range you are asking about, he added a chamfer to the top of the hex head of the screw. He did this in 3 steps:

1. he sketched a line defining the position and angle of the chamfer

2. he made a Revolve surface 360 deg, rotating the line sketch about the x-axis

3. he Split the screw head with the surface to remove the chamfer

Watch the video very closely to get all the steps

[MrCATIA]

A better way to chamfer the hex head, is to draw a sketch of the triangular chamfer, and then use a Groove to remove the revolved sweep. (This can all be done with the Part Design workbench, and doesn't require switching to the Generative Shape Design workbench in order to make a surface)
kinston5.JPG