Just go to the bottom of the toolbar on the right of the window and select "other tools". There you will be able to choose the "Measurements" tool. From now on, this tool will be present on the right next to the others (it should be pink).
Just go to the bottom of the toolbar on the right of the window and select "other tools". There you will be able to choose the "Measurements" tool. From now on, this tool will be present on the right next to the others (it should be pink).