Undocumented feature: Set background of any PD4 dialog window

[tacit_one]

This is an undocumented feature of PD4 -

It is possible to set background of (almost) every dialog window
by dropping an image file while holding OPTION or OPTION+SHIFT (scaled) keys combination.

Example: Dialog before

Example: Dialog after

Drop any non-image file to clear background.

NOTE: This is not an official feature, so it is not officially supported.
Someone may find it interesting / useful anyway.

Regards,
Max