The Print dialog window is larger than the screen, not re-sizable or moveable (upward), and has no scrollbar to reach the Print button! There have been bugs filed for previous LO versions and fixed, but this is a regression that has not seen a patched release. Is there a workaround?
~$ lsb_release -d ; uname -rp ; gnome-shell --version ; echo $XDG_SESSION_TYPE
Ubuntu Focal Fossa (development branch)
kernel 5.4.0-21-generic x86_64
GNOME Shell 3.36.0
window mgr: wayland (but occurs in x11 as well)
screen resolution 1366x768
CPU Intel® Core™ i3-5005U CPU @ 2.00GHz × 4
Graphics Mesa Intel® HD Graphics 5500 (BDW GT2)
WORKAROUND FOUND
Thanks to: FerbTux 2020-04-03 Comment 67 bug id 127782 (#c67): (Attach Modal Dialog must be turned OFF)
With the cursor anywhere in the Print dialog window, press Alt-F7 (this detaches the Print window.) The cursor will change to a Move icon (it may be a grab-hand or a four-arrow icon, depending on the cursor theme you have chosen. You can now move the Print dialog window up past the GNOME shell topbar to expose the Print button at the bottom of the dialog window.
Click the cursor again or press the SPACE key to release it from the move-action, and press the Print button.