Inq allows checking the ink level of many printers with USB or parallel port interface.
At every start-up Inq detects all the supported printers, which are associated to some predefined device nodes.
The program's main window is divided into four parts from top to bottom
Inq has three menus : File, Settings and Help
When the program detects more than one printer, they are added to the selector at top, but only one pf them is considered the current printer and their ink levels are shown in the central area of the window.
In the central area of the window the current printer's ink levels are shown. When the mouse holds over a cartridge for a while, a tooltip is shown containing the ink name (ex: black, magenta,…) and its level expressed as per cent.