Now let's see the whole navigation cluster of the UHK that you can reach via the Mod keys:
Here's how you can access the newly introduced navigation keys:
  • Mod + Y = Page Up
  • Mod + H = Page Down
  • Mod + U = Home
  • Mod + O = End
  • Mod + P = Delete
  • Mod + : = Insert
Use the above keys to fill out the 4 corner cells of this table:

Well done! Let's move on.