"Add to visual task board" UI action from within the record will display a freeform board only if the logged in user owns one.
- Navigate to sc_task.LIST
- Open an existing record
- Right click the grey header > Add to visual task board
If the logged in user does not own any freeform board, it will display a message "You have no freeform boards" as shown in the below image:
Hence, the logged in user needs to own a freeform board in order for a freeform board to show up when he clicks "Add to visual task board".
User can create a freeform board by navigating to Visual task board > Create New > Freeform board.
Lear more about Freeform boards using the below document: