Specify window sizes/positions

[mock1328]

I use kickoff with hyprland and waybar as my bar. kickoff clearly doesn't take the whole screen in this case, and the difference between bar and other parts of screen is noticable.
As my default runner, I use tofi with some light theming to control window size, position, borders, etc, so it runs in the middle of my screen in a small window.
Is the same dehavior for kickoff possible?