How to annotate a screenshot with lines, shapes or arrows

To add a shape, an arrow or draw a line:

1. Select the rectangle icon, ellipse icon, arrow icon or pen icon in the side menu
2. Choose the thickness and color you like
3. Click somewhere you want to annotate on the screenshot
4. Hold your mouse then drag the annotation to the size you want 

To change the position of an annotation:

1. Mouse over the border of a shape or a line
2. Wait for your cursor to become a cross arrow icon
3. Click and hold to drag and move it where you want

To change the size of a shape or an arrow:

1. Mouse over the border of a shape or an arrow
2. Click on the border to select the annotation
3. Once selected, blue dots will appear 
4. Drag a blue dot to adjust the size 

To change the pointing direction of an arrow: 

1. Mouse over the border of an arrow
2. Click on the border to select the arrow
3. Once selected, blue dots will appear 
4. Drag a blue dot to adjust the pointing direction 

To change the thickness or color of an annotation:

1. Mouse over the border of an annotation
2. Click on the border to select the annotation
3. Once selected, the annotation will be surrounded by while line
4. Choose another thickness level or color in the side menu