How to set up sections, dashboard and user interface in the system?

Problem: I need to remove some sections and documents also configure the Home page dashboard, how can I do that in the system?

Solution: The user interface can be changed from the particular user accounts, using interface settings.
                Every User will have their own settings saved and will not reflect on other user accounts.

1) Dashboard setting: 

Go to Service and Settings > Settings Home Page Setup:

You can move the available form to the Left or Right sides of the screen and press OK:

2) Sections Setup: 

Go to Service and Settings > Sections panel Setup:

Here you hide or make visible needful sections:

3) Documents list Setup: 

Inside the section, you can press the Settings sign and select Navigation settings:

Here you hide or make visible needful items:

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