Calculator documentation is incomplete in both 5.10.1 and 5.11.0
Please document all the functions the calculator can use on the input line. For example, I used avg(scaler) and it produces a useable output. This particular function is not listed in the documentation at docs.paraview.org. What other functions can you call from the calculator that are not listed? This applies to both 5.10.1 and 5.11.0.
For 5.11.0 there are three icons/buttons that are above the entry field on the right. The functionality of these icons/buttons needs to be documented. It appears the first icon lists any expressions that you have saved, so you can use them. The second icon appears to save the current expression to an expressions list. The third button appears to open the expressions list, so the user can search for an expression that has been saved; add, remove, import or export any expressions that have been used in the past.