How to show/hide Smart Lists ?
There are 7 default lists in TickTick: All, Today, Next 7 Days, Assigned to me, Calendar, Tags, Completed. Some of them are hidden by default, and you can enable them by the following steps:
Take "Completed" as an example:
Go to Settings page from the tab bar.
Tap "Smart List".
Choose between "show"/"Hidden"/"Auto".