"From" should be in the Transport area but I don't see it.
Possibly you have resized the window, maybe to have something else onscreen alongside it?
"Play from Bar ..."
is on the Transport Bar, but disappears with others as you reduce the width of the window and thereby the space available for the Transports.
The buttons that get dropped during a resize don't disappear sequentially from the reducing-side as you would expect however ... "Conductor Window" goes first, then "Record Audio" next as the transport bar shortens, then last the "Play from Bar" button.
I'm sure this has been done in order to preserve the *basic* transport buttons, though like you I miss "Play from" being there more often than I had expected even though I often double-click anyway ...
So if you did reduce your window, resize it again in increments and Play From will pop back - it is the last to disappear so is the first to return, and you will still have a reduced window just not by as much as without it.
Related: One for PG's technical guysWhen you resize the Transport Bar and the "Conductors Window", "Record Audio" and "Play from Bar" buttons disappear as mentioned above, the first two appear as dropdown options when you click the "More" arrows at the end of the Transport Bar but the "Play from Bar" button does not, making it unavailable in a resized window. This would have solved FirstBassman's issue, and is worth addressing.