Tip 1.
Work Bench: Sketcher
   
How to have similar dimensions for a set of geometries from a reference dimension?  
   
Procedure:  
   
1. Draw a geometry. Assign the required dimension to that.  
 
   
2. Draw few other geometries of similar kind in the same window.  
 
   
3. Copy the dimensions of the first geometry and paste it on the other geometries.  
 
   
 
   
4. You will notice that the old dimensions have been assigned to the new dimensionless geometry.  
 
   
Tip 2:  
Work Bench: Part Design.  
   
How to Relocate / Add multiple elements to the Feature definition in a Solid Model?  
   
Procedure  
   

1. Have a solid model with a fillet on one edge as shown in the image.

 
 
   
2. Select the fillet, Hold the Shift button on the Keyboard and pick an alternative edge on the solid model. You will find that the feature shifted to the new edge.  
 
   
 
   
3. Select the fillet, Ctrl button on the Keyboard and pick few others edge on the solid model. You will find that the feature got generated on the selected edges too.