The collapse header function on Tableau Server 2019.1 is missing so we want it back:
What it does
The collapse header tool allows the top header on a Tableau Server displayed viz to hide.
(1) Header displayed. Clicking the up arrow will hide the header.
(2) Header hidden. Clicking the down arrow will expose the header again.
Yeah...why was it removed after being in use all these years?
Because it frees up screen real estate to allow more of the viz to display without losing the tool bar functions (Alert, Subscribe, Edit, etc.) nor the breadcrumb trail.