In the center is the background image of the stream and your configured analytics. Move the image by clicking and dragging and zoom with mouse wheel. Here you can move and edit the analytics, but only the ones corresponding to the selected tab, these will be highlighted. You can set a new background by clicking the button on the top right.
Configuring the analytics is done in tabs on the right side. You can disable analytic, remove and add instances. Edit the instance by clicking the highlighted squares (handles) at the edges. Create a new handle by double clicking on one of the lines. Right click a handle to open a menu where you can delete it or export the ROI. Bellow you can select which classes trigger the analytic.
ROI filtering - Regions of interest let you set up specific areas, in which the number of objects can be monitored. Clicking the toggle at the bottom will inverse the area of the selected ROI.
OC detection - Similar to ROI, except they don't provide the information of how many objects there are, only if a certain limit was exceeded. This limit can be configured at the bottom of the tab.
LC detection - Line crossing detection allows you to set up lines and corresponding directions to count how many objects move through the line in the specified direction. You can configure what angle counts as the specified direction in the bottom of the tab as loose, balanced or strict. There you can also toggle extended lines. If enabled, the configured line acts as if it were extended to the edge of the screen.
Direction detection - Similar to LC, except there is no line. Direction detection will count all objects moving in the specified direction. As with LC, you can configure what angle counts as the specified direction in the bottom of the tab as loose, balanced or strict.