When you paint on the grid of the perspective view, the stroke lies on that plane. 
	 
To paint on the grid plane of the perspective view 
	 
- Select 
		  . 
		
- Ensure there are no paintable objects in the scene. To do this, in the scene view, deselect all objects by clicking anywhere on the scene that is not an object, then select 
		  . 
		
- In the 
		  Content Browser (in 
		  Modeling menu set, choose 
		  ), or on a shelf, click the brush preset you want to paint with. 
		
- Modify stroke settings, if necessary (). For information on modifying stroke settings, see 
		  Paint Effects Tool Options. 
		
- Modify brush attributes, if necessary (, or use the Ctrl-b (Linux and Windows) or Control-b (Mac OS X) hotkey combination. For information on modifying brush attributes, see 
		  Paint Effects Brush Settings. 
		  
Tip: You can use hotkeys on the canvas to interactively change the 
			  Global Scale (set ModifyUpperRadius, default hotkey, b), the 
			  Brush Width only (set ModifyLowerRadius), and 
			  Stroke Offset (set ModifyDisplacement, default hotkey, m) under 
			  Brush Tools in the 
			  Hotkey Editor. For information on other 
			  Paint Effects hotkeys, see 
			  Use default Paint Effects hotkeys in 
			  Prepare to use Paint Effects. 
		   
 
- In either the scene view or the scene painting view, drag across the plane. 
		  For information on the scene painting view, see 
			 Change object shading in the scene painting view. For information on working in the scene painting view, see 
			 Automatically paint multiple strokes on a surface.