Unable to add a tmap title in interactive viewing mode

Question

I am using tmap on RStudio 1.4.1103.

When I attempt to add a title to my map using the tm_layout() function call, I am able to see the title in plotting mode, but when I switch to interactive viewing mode, the title disappears.

Reproduceable code and example image shown below:

library(tmap)

data("World")

ttm()

tm_shape(World) + tm_polygons("HPI") + tm_layout(title="Hello World!")

Answer 1

Update: It appears this is an issue in the most recent version of tmap, as documented here .