This is an experimental feature.
Since version 1.4.4 it’s possible to have the tooltip or a marker or region be always visible or display when the marker or region is clicked.
You can find the option to enable this in the Tooltips tab, first enabling the ‘Fixed’ option and select the ‘Show Tooltip On’.
This feature is still experimental and might not provide consistent results at the moment.
In the example above we have some tooltips that always display and some others that display on hover. We achieve that with the overlay feature, creating 2 maps. One map will have the always visible tooltips and the other will have the tooltips on hover. We then display all entries in the same map using the overlay option.