You can select (highlight) items in the remote or local by name or type using Group Select and wildcard masks.
Choose the pane displaying the files you want to select.
From the menu, choose Edit > Group Select.
In the Select group box, enter *. (Asterisk, period) and then the extension for the file type you want to select.
Clear Mask directories to exclude folders from the selection.
Select Remove Selection to include previously selected files in the new group you are selecting, or clear the check box to unselect any previously selected items that are not in the new group.
Select OK.
From the menu, choose Edit > Invert Selection.
Select the items to remove from the group.
Choose Edit > Group Deselect from the menu.
In Deselect group, enter the name of the file you want to remove, or use wildcard masks to remove a group of items.
Select Mask directories to include folders in the action.
Select OK.