[qiqitori]

You can do Alt+F3 ↓ ↓ ↓ → enter and then move the window using cursors keys (and hit enter to apply the window position)

You can also assign a shortcut to get to this point (in Shortcuts -> Global Shortcuts -> System Settings -> Move Window).

I don't think you can get what you're asking for without writing a tiny script and setting it to be invoked with your keyboard shortcut.

[mg]

While it works, the problem with "Alt+F3 ↓ ↓ ↓ →" is that when I move the window afterwards, the cursor keys get passed through to the window. So when I do that on Firefox, the website scrolls up and down. When I do it on a terminal, it invokes my bash history.

[ankurdhama]

Try the arrow key(s) (after selecting resize in window menu) while pressing down Super key.

[mg]

Which one is the "Super Key"? If it is the window key - that one in combination with the arrows is already mapped to tiling functions. Window+UP makes the current window take half of the screen on the upper side.

[ankurdhama]

Oh sorry, use shift key + arrow keys. Not the super key.