Field Track users what is called a 'Splitter Bar' on some screens to allow you to resize areas of the window to your liking at any given time. You can change the colour and width, or height of the bars to make them easier to grab with the mouse in your "Option" - "Configuration Settings" menu:
This can make the splitter bars easier to grab with the mouse and move about to adjust the screen. You can also save your screen designs in the "Advanced" interface and also load one of your designs as default.