The Find and Find Next commands are available in both the Capture and Decode tabs.

These commands change the current selection and clear any multiple selection that may have been in effect.

Find... (Command-F)

The Find... command searches packets for ASCII text. The search begins at the current selection and wraps around at the end of the packet list.

Find	Enter the text to be searched for here.
Ignore Case	Causes upper and lower case letters to be considered the same for matching purposes.
Regular Expression	Causes the search string to be interpreted as a Unix regular expression [see regexp(3) in the Unix man pages for more details].

You can change the default settings for the Ignore Case and Regular Expression checkboxes in the Search Preferences.

Find Next (Command-G)

The Find Next command restarts the search, beginning with the packet after the current selection. Both the Find... and Find Next commands are available in the Capture and Decode tabs.