How do I create anchor links?

To insert an anchor link pointing to a certain block (section) within a page, add a special block to the place you need — anchor ("Other" category → T173 Anchor link in the Block library). In the Content of this block, specify the anchor title, such as "contacts". You can now link to it in any block by specifying a link that looks like #contacts. When the visitor clicks the link, they jump to the anchor.

To ensure that anchor links work everywhere, use links that look like /#anchor (for anchor links on the Home page) and /page#anchor (for anchor links on other pages).

More in detailed guide: http://help.tilda.ws/anchor 

For a smooth scrolling effect, add block T178 from the "Other" category. You don't need to change any settings. Add only one T178 block per page. This will ensure smooth internal link transitions.