Using GNOME/Sticky notes
Sticky notes is an applet that displays windows that look like Post-its, little self-adhesive reminders.
To add to the panel, right click on the place you want the Sticky notes applet to appear, select Add to panel..., Sticky notes. It will appear as a yellow icon that looks like a block of post-it notes.
To create a note right click on the applet and select New Note. A window will appear in which you can type your message. The window can be resized by dragging either of the lower corners. The note will overlay any other windows and will follow you from workspace to workspace. To hide the notes select 'Show notes' from the applet icon menu to uncheck that item.
Sticky notes can be any colour you like, and any font. Right click on the title of the sticky and choose properties.
A locked sticky note cannot be edited.