By default the last used list to scan will be saved, you can select it (if any) by choosing the "Last Used" menu item.
Save List to Scan
Opens a dialog that allows you to save the current checked list to scan. Optionally you can save the current excluded items. Dimmed if there is nothing to save.
Remove
Opens a dialog that allows you to delete the previous saved list to scan. Dimmed if there is nothing to remove.
Toggle Icon Size
Change the size of the icons of the locations of the list to scan. There are two sizes, small 16*16 pixels and large 42*42 pixels.
Replace: shows the chosen criteria pane by replacing all the visible items. Dimmed if already visible.
Remove: removes the chosen criteria pane. Dimmed if it isn't visible or if it is the only visible item.
An icon like at the top left of the pulldown menu image, means that the criteria pane contains chosen criteria but it isn't visible.
By default the last used criteria will be saved, you can use it (if any) by choosing the "Last Used" menu item.
Save Criteria
Opens a dialog that allows you to save the current checked criteria. Dimmed if there is nothing to save.
Remove
Opens a dialog that allows you to delete the previous saved criteria. Dimmed if there is nothing to remove.
Here you can see the description of the chosen criteria.