When using the "log in as" feature, the profile pictures of both users involved show in the user menu in the top right (as per https://docs.moodle.org/32/en/Log_in_as and the screenshot below using the Clean theme)
However, there seems to be a bug in the Aardvark theme which messes up the display of these pictures, see screenshot:
Moodle 3.2.1+, Aardvark 3.2 (2017020203)
When using the "log in as" feature, the profile pictures of both users involved show in the user menu in the top right (as per https://docs.moodle.org/32/en/Log_in_as and the screenshot below using the Clean theme)
However, there seems to be a bug in the Aardvark theme which messes up the display of these pictures, see screenshot: