I am doing this tutorial. After creating this large building (consisting of several meshes) in part 1 CG Geek is now joining all these meshes to one object. This is done in the first five minutes of the tutorial. But before he joines those meshes he does ALT CAltC. I don't understand why he first does the ALT CAltC and then joines the meshes
Changed <kbd>ALT C</kbd> to <kbd>Alt</kbd><kbd>C</kbd>