Selecting & querying about  features must be easy & flexible, as it is a very common, everyday task in using a GIS. We see in the picture a polygon (yellow coloured) from a query (area > 10000000 & type = 3), by filling a form (lower right). Selection, is critical to can be done (as here) simply by pointing on a feature in the view window or in the attribute table window & the selection colour (here yellow) reflects in both windows the same time. We can also see in a table form (lower center) the identification results of a feature we selected just pointing on it, using a proper button (i).