View full message from gnome notifications area

Solution 1:

Have you tried the Notify OSD app? It is quit useful if you want to configure your notifications. You can read more about it here: https://wiki.ubuntu.com/NotifyOSD

Here are the steps how to install it from the terminal:

sudo add-apt-repository ppa:leolik/leolik
sudo apt update
sudo apt install notify-osd
pkill notify-osd
sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt update
sudo apt install notifyosdconfig

Or you can simply download the .deb installer from this link (from ppa.launchpad.net/nilarimogard/webupd8/).

Solution 2:

Answer

If what you are looking is to see the full message somewhere, the GNOME extension "Notifications to file" allows you to store the notifications to a file of choice.

Expert mode

If you are looking to see the full message in the notification list of your screenshot, you may want to change the CSS of that specific section of GNOME. There are some tutorials that help to do this, but I do not recommend to go this route unless you know what you are doing. You can see the documentation on Gnome Shell wiki page.

You can find all CSS related to these notifications on the file gnome-shell.css of your gnome-shell theme, located on:

/usr/share/gnome-shell/theme/gnome-shell.css

The CSS related to these specific notifications are under the CSS class .message-list.

Solution 3:

There are various add-ons that might help.

This stops apps removing their own: https://extensions.gnome.org/extension/1335/grown-up-notifications/

This keeps them visible until clicked: https://extensions.gnome.org/extension/41/permanent-notifications/

This shows a counter: https://extensions.gnome.org/extension/1386/notification-counter/

And so on. You might need to try some combination to see if that helps...