The following table describes the mouse controls used in FCheck:
| Mouse button | Description | 
|---|---|
|  
				   | 
 
				   Click and drag to scrub through a sequence of frames. Drag left to reverse and right to advance.  | 
|  
				   | 
 
				   (Windows and Linux) Middle-click the playback window to display coordinates of the pixels under the cursor. The coordinates appear in the command-line window.  | 
|  
				   | 
 
				   (Windows and Linux) Right-click to activate the dot drawing tool in the image plane. Right-drag to create a flowing line.  |