A good way to shorten the icons instead of going from section to section and tiring yourself explaining in images

1_ Click on the word more

2_ Click on the yellow pencil icon

3_ In the bottom part where the (+) sign is, you can add any icon you want to have on the main interface of the application

As for the top part where the (_) sign is, you can delete the icon you don't need on the main interface

When finished, click on Done