You can ignore packets in the “Packet List” pane. Wireshark will then pretend that this packets does not exist in the capture file. An ignored packet will be shown with white background and gray foreground, regardless of the coloring rules set.
The packet ignored marks are not stored in the capture file or anywhere else. All “packet ignored” marks will be lost when you close the capture file.
There are three functions to manipulate the ignored state of a packet:
These ignore functions are available from the “Edit” menu, and the “Ignore packet (toggle)” function is also available from the pop-up menu of the “Packet List” pane.