You can create a graphically formatted note (caution), warning, info, or tip box. For instructions, refer to Atlassian help:

https://confluence.atlassian.com/conf613/info-tip-note-and-warning-macros-964960835.html

Consider the following examples. To view the markup for these examples, open the Source Editor for this page, as described in Editing a Page

The body of the note.

The warning message.

The useful information.

The tip.