How to use Sketch App you need to understand Sketch App interface, it is the first step

1. Sketch App 3.4
Interface
By : Muhamad Hussein
session 15-10-2015

2. Tools bar
layers
Objects
menu bar
Art board

3. 1. Vector
2. Pencil
3. shape
4. text
5. image
6. Artboard
7. slice
Insert :

4. 1. edit
2. Transform
3. Rotate
4. Flatten
5. Mask
6. Scale
7. Union
8. Subtract
9. Intersect
10. Difference
Shape edit :

5. Objects Menu bar
1. Position
2. font size
3. Transform Shape
4. control on shape radius
5. Opacity - Blending
6. Fills colors
7. Borders colors
8. some edit on shape like:
shadows
inner shadows
Gaussian Blur