The stroke modifier almost creates a new shape along the edges of your main shape.
        
                            It's similar to 
                     Solidify Path
                    Transform lines in shapes given by splines
                    Read More
Solidify Path
                    Transform lines in shapes given by splines
                    Read More
                     but for 
                    Shape layer
                    Bezier shape and drawing
                    Read More
                    .
        
                            This modifier lets you:
        
                    
                      - 
                        Trace the edges like a shape
                      
- 
                        Create a snake effect along the edges
                      
- 
                        Modify the aspect of the caps
                      
- 
                        Dash the stroke
                      
- 
                        Repeat the stroke
                      
                            Note that by using this modifier, filling method is changing.
     
                    Thickness
                         Use it to modify the thickness of the stroke.
        
 
                    
                     
                    
                    Trace
                         Trace the stroke and create a snake effect.
        
 
                    
                     Warning:
                    
                    
                      Warning:
                     Placed over a 
                    Group of shapes
                    A group of shapes
                    Read More
                     , the trace option changes depending of the blending mode of the different shapes inside.
        
                            The option "Group behaviour" is also useful when placed over a 
                    Group of shapes
                    A group of shapes
                    Read More
                     a or a 
                     Text
                    A text shape
                    Read More
Text
                    A text shape
                    Read More
                    . It's quite like the option "shape index" of the 
                    Position in Shape
                    Define how the modifier is applied
                    Read More
                     mask.
        
                            The trace option will take all the shapes or characters and trace the stroke one after the other.
        
 
                    
                     
                    
                    Stroke cap (Start/End)
                         Similar to 
JoinerSet a joiner between 2 shapes 
                    , only available if Trace is enabled.
                         Modify the way caps of the stroke join the rest of the edges.
     
                            You can choose between 6 modes for caps:
        
                    
                      - 
                        
                          Fillet  
                        
                      
- 
                        
                          Chamfer  
                        
                      
- 
                        
                          Smooth (polynomial)  
                        
                      
- 
                        
                          Smooth (exponantial)  
                        :  control this mode with the "Exponent" parameter 
                      
- 
                        
                          Columns  
                        :  control this mode with the "Count" parameter  
                      
- 
                        
                          Stairs  
                        :   control this mode with the "Count" parameter 
                      
 
                    
                             Depending of the associated radius parameters, caps begin earlier/later along the shape.
         
                             If you want to go further with custom caps, use 
                     Instantiate
                    Compose a shape with other shapes
                    Read More
Instantiate
                    Compose a shape with other shapes
                    Read More
                    !
     
 
                    
                    Dash
                         Use it to replace the stroke by a dashed line.
        
 
                    
                           Stroke modifiers have a Dash sub-object that can be customized with these parameters:
       
                    
                      - 
                        
                          Size
                        : the length (in px) of each dash
                      
- 
                        
                          Gap Before
                        : Define the margin (in px) before each dash
                      
- 
                        
                          Gap Before
                        : Define the margin (in px) after each dash
                      
                          Dash modifiers have 2 other variables:
      
                    
                      - 
                        
                          Offset
                        : The offset of each dash
                      
- 
                        
                          Scale
                        : The Scale (in %) of each dash. If you have set the size parameter of your dash to 100px and this parameter to 50%, every dash will appear with a length of 50px (50% of 100) 
                      
                          Note that you can add as many "Dash" sub-objects as you want by right-clicking on the Stroke modifier and choose Dash.
     
 
                    
                    Repeat (Inside/Outside)
                         Repeat the stroke.
        
 
                    
                    
                      - 
                        
                          Count
                        : Number of repetitions
                      
- 
                        
                          Distance
                        : Distance (in px) between each repetition
                      
- 
                        
                          Radius Multiplier
                        : Thickness of the repetition. Depends on the thickness of the the stroke modifier