I pasted you a tutorial how to make anchor menu, but it's the same as for buttons, just
add to href an id's section.
1. Go to menus and create a new menu - http://prnt.sc/f2v9he 2. Name the menu and add a custom link with the ID anchor you will use later(do not use spaces). Add to menu -http://prnt.sc/f2v9th 3. When the menu item is added to the menu, save and go to Manage Locations -http://prnt.sc/f2vafb 4. You go to your main page, you see the new link but when you click nothing happens? No worries, it is because the link has to know where to scroll, to do this edit the page. -http://prnt.sc/f2vc36 5. Edit the section to which you want the button to scroll -http://prnt.sc/f2vcho 6. In the field Custom ID type in the id from the button, in my case, it was id=work, no hashtag there -http://prnt.sc/f2vgaz 7. Remember to have the one-page option selected under the muffinbuiler -http://prnt.sc/f2vcm7
If you do not want to use a normal menu to link the user to sections, you need to add a 'scroll' class to the custom link element.
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2. Name the menu and add a custom link with the ID anchor you will use later(do not use spaces). Add to menu -http://prnt.sc/f2v9th
3. When the menu item is added to the menu, save and go to Manage Locations -http://prnt.sc/f2vafb
4. You go to your main page, you see the new link but when you click nothing happens? No worries, it is because the link has to know where to scroll, to do this edit the page. -http://prnt.sc/f2vc36
5. Edit the section to which you want the button to scroll -http://prnt.sc/f2vcho
6. In the field Custom ID type in the id from the button, in my case, it was id=work, no hashtag there -http://prnt.sc/f2vgaz
7. Remember to have the one-page option selected under the muffinbuiler -http://prnt.sc/f2vcm7
If you do not want to use a normal menu to link the user to sections, you need to add a 'scroll' class to the custom link element.