Lucent Technologies Ethereal - Manual (Page 69)

3.14. The "Filter" toolbar
The filter toolbar lets you quickly edit and apply display filters. More information on display filters
is available in
Section 6.2, “Filtering packets while viewing” .
Figure 3.12. The "Filter" toolbar
• The leftmost button labeled "Filter:" can be clicked to bring up the filter construction dialog, de-
scribed in
Figure 6.8, “The "Capture Filters" and "Display Filters" dialog boxes” .
• The left middle text box provides an area to enter or edit display filter strings, see Section 6.3,
“Building display filter expressions” . A syntax check of your filter string is done while you are
typing. The background will turn red if you enter an incomplete or invalid string, and will be-
come green when you enter a valid string. You can click on the pull down arrow to select a pre-
viously-entered filter string from a list. The entries in the pull down list will remain available
even after a program restart.
Note!
After you've changed something in this field, don't forget to press the Apply button
(or the Enter/Return key), to apply this filter string to the display.
Note!
This field is also where the current filter in effect is displayed.
• The middle button labeled "Add Expression..." opens a dialog box that lets you edit a display fil-
ter from a list of protocol fields, described in
Section 6.4, “The "Filter Expression" dialog box”
• The right middle button labeled "Clear" resets the current display filter and clears the edit area.
• The rightmost button labeled "Apply" applies the current value in the edit area as the new dis-
play filter.
Note!
Applying a display filter on large capture files might take quite a long time!
User Interface
55