The Market & Watch Tab Icon ToolBar allows you to Create/Modify/Manage your Lists.
Hover your cursor over the icon to view it’s ‘task’: 
Select Candidates
Send to Research
Add/Delete a List
Modify an existing List
Send candidates from one List to another
Remove candidates from existing List
Change View: List or Tile
To Create a New Watchlist:
1. Under ‘Create Watchlist’, enter symbols – separating eachwith a comma or (space)
2. Enter the name of New Watchlist
3. Click “Create”
Other ways to Create Lists include:
From the Find Tab>Scans and Find Tab>Calendar.
Selecting candidates from Scans (Ex: Bullish Ascending Triangle ) or Calendar for an Earnings or Dividend date to get the list of stocks that fit your selected criteria, click the “Check” icon to the stock symbols you want to keep, then click the Folder + icon to , name your new Watch List then click “OK”.
You can also copy/paste up to 100 symbols from an outside source to a newly created (or existing list) provided the following apply:
The symbols are separated by:
A Space: TSLA ZM GOOG NFLX
Or by a Comma: TSLA,ZM,GOOG,NFLX
Or a Return:
TSLA
ZM
GOOG
NFLX