When you enable

Start | Settings | Settings and Startup | Advanced | Launch Gnome services at startup

it is possible that all the custom made notifier configurations get lost
The configuration of personal notifiers as described below does not seem to work any more
After turning Gnome services off at startup everything seems to be working as normal

Desktop Notifications Specification

The new, upstream, indicator system is Ayatana

In Xfce serveral notifier applets can be activated in the tray

• Recommended:
  • Notification plugin (With the black bell icon. Also shows the notifications this page is about)
  • Status Tray Plugin
• StatusNotifier Plugin
• Similar, the configuration windows look the same:
  • Indicator Plugin
  • Status Notifier Plugin. Has also a maximum icon size in pixels setting

With

notify-send "Hello"

a popup message can be shown.
If you want to use an icon use

notify-send -i /usr/share/icons/Tango/22x22/status/dialog-information.png "Hello"

This does not work for notify-send
Solution: t.b.d.

Command format

notify-send [OPTIONS] <summary> [body]

• OPTIONS see table below
• summary: text in bold typeface
• body: text in normal typeface (on a new line)

Only long option given. There might be a short option. See the man page

Do

• Start | Settings | Appearance | Tab Icons | Note the selected Icon theme
• Do cd /usr/share/icons/IconThemeName or
• In a terminal do find / -name “*Icon theme name*” 2> /dev/null
• Now you should had found the path to the icons. There might be icons in different sizes

notify-send  echo "$(echo Hello)"

With, in a terminal window,

notify-send "Hello"

a popup message can be displayed.

You can create your own format. Do

cd /usr/share/themes
sudo mkdir -p MyNotifier/xfce-notify-4.0
cd MyNotifier/xfce-notify-4.0/
sudo touch gtk.css
sudo vi gtk.css

and paste

#  /usr/share/themes/MyNotifier\!/xfce-notify-4.0/gtk.css
 
#XfceNotifyWindow {
    background-color: #ff69b4;
    border-radius: 10px;
    border: 6px solid #ffff00;
}
 
#XfceNotifyWindow label,
#XfceNotifyWindow image {
    font-family: Comic Sans MS;
    font-size: 22;
    color: #ffff00;
}
 
#XfceNotifyWindow label#summary {
    font-weight: Bold;
}
 
#XfceNotifyWindow button {
    border-style: none;
    background-image: none;
    background-color : #9400d3;
}
 
#XfceNotifyWindow button:hover {
    border-style: none;
    background-image: none;
    background-color : #5e0086;
}
 
#XfceNotifyWindow progressbar {
    border-radius: 3px;
}
 
#XfceNotifyWindow progressbar progress {
    min-height: 16px;
    background-image: none;
    background-color: shade(#ffff00, 1.2);
}
 
#XfceNotifyWindow progressbar trough {
    min-height: 16px;
    background-image: none;
    background-color: #5e0086;
    border: 1px solid shade(#5e0086, 0.6);
    border-radius: 3px;
}

into it.
Change colors, fonts and attributes to your liking. For some ideas for colors see the Crayola crayon colors
For fonts, have a look in Libre Office Writer for inspiration. Dejavu, Noto Free mono are some alternatives
Save the file and exit vi
Now do

start | Settings | Notifications

a window is shown

Clik on Preview and then on the Theme roldown menu. With the up and down cursor keys you can go through the various themes, including the one you just made. If yours doesn't show go through the list several times, that might solve it.
By changing the size, background color, font color and font type in gtk.css you can configure your own notifier. Have fun
If you want to use notifier-send in a script have a look at Notifier

With, in a terminal window,

notify-send "Hello"

a popup message can be displayed.

You can create your own format. Do

cd /usr/share/themes
sudo mkdir -p MyNotifier/xfce-notify-4.0
cd MyNotifier/xfce-notify-4.0/
sudo touch gtkrc
sudo nano gtkrc

and paste

#  /usr/share/themes/MyNotifier\!/xfce-notify-4.0/gtkrc
 
style "my-window"
{
    bg[NORMAL] = "#4d4dff" 
    XfceNotifyWindow::border-color = "#CCffCC"
    XfceNotifyWindow::border-radius = 20.0
    XfceNotifyWindow::border-width = 2.0
}
class "XfceNotifyWindow" style "my-window"
 
style "my-text"
{
    font_name = "Comic Sans MS 20"
    fg[NORMAL] = "#ffff00"
    GtkWidget::link-color = "#a700a7"
}
widget_class "XfceNotifyWindow.*.<GtkLabel>" style "my-text"
 
style "my-button"
{
    bg[NORMAL] = "#202020"
    bg[PRELIGHT] = "#404040"
    fg[NORMAL] = "#ffccff"
    fg[PRELIGHT] = "#ffffff"
}
widget_class "XfceNotifyWindow.*.GtkButton*" style "my-button"
 
style "my-btn"
{
    bg[NORMAL] = "#9400d3"
    bg[PRELIGHT] = "#5e0086"
}
widget "XfceNotifyWindow.*.GtkButton" style "my-btn"

into it.
Save the file and exit nano.
Now do

start | Settings | Notifications

a window is shown

Clik on Preview and then on the Theme roldown menu. With the up and down cursor keys you can go through the various themes, including the one you just made. If yours doesn't show go through the list several times, that might solve it.
By changing the size, background color, font color and font type in gtkrc you can configure your own notifier. Have fun
If you want to use notifier-send in a script have a look at Notifier

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