How do I set a picture for my user on the login screen in Lubuntu 20.04?

Question

I would like to display an image of my choice instead of the grey icon above my username on the login screen:

No doubt there is a setting for this somewhere, but I have failed to find it so far.
How do I change user images in the SDDM greeter?

Useful for testing -- you can use this command to preview the login screen without logging out.

nobody · Answer

sudo nano /etc/sddm.conf

Under block [Theme].
[Theme]
EnableAvatars=true
FacesDir=/usr/share/sddm/faces

I named my picture my-user-name.face.icon, so I don't mix it with user-pictures from other users.

guiverc · Answer

This answer was provided in comment first by @yfluK
I'll suggest you look up the manual, ie. https://manual.lubuntu.me/stable/3/3.1/3.1.9/sddm_configuration.html?highlight=face%20icon

To change the picture for your user when you login simply copy the
file you want as your user picture to in your home folder with the
name .face.icon .

The file is located in ~ (your user directory)

UnKNOWn · Answer

There is a good guide for this on https://wiki.archlinux.org/index.php/SDDM#Installation

User icon (avatar) SDDM reads the user icon (a.k.a. "avatar") as a PNG
image from either ~/.face.icon for each user, or the common location
for all users specified by FacesDir in an SDDM configuration file. The
configuration setting can be placed in either /etc/sddm.conf directly,
or, better, a file under /etc/sddm.conf.d/ such as
/etc/sddm.conf.d/avatar.conf.
To use the FacesDir location option, place a PNG image for each user
named username.face.icon at the location specified by the FacesDir key
in the configuration file. The default location for FacesDir is
/usr/share/sddm/faces/. You can change the default FacesDir location
to suit your needs. Here is an example:
/etc/sddm.conf.d/avatar.conf
[Theme]
FacesDir=/var/lib/AccountsService/icons/

I Just kept the pic I wanted in /usr/share/sddm/faces/ with the name <user-name>.face.icon As per the wiki it seems only .png files are supported.

How do I set a picture for my user on the login screen in Lubuntu 20.04?

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