On 05/04/2018 15:53, Robin wrote:
On 05/04/2018 14:14, David wrote:

Whatever do you do if you are trying to level a picture rail in a 18th
Century room with 10 foot (or higher) ceilings?


Some have an extending floor-to-ceiling pole which can be used to mount
the level at the right height - as eg in
https://www.screwfix.com/p/bosch-tp-320-professional-telescopic-pole/3921K?k


Some of us balance it on blocks a rung of a ladder leaning against the
wall


Sorry, that should have been "the opposite wall"

--
Robin
reply-to address is (intended to be) valid