There's a "sneaky" way to do this that doesn't require creating a project record named "no selection".
Define a calculation field, cProjectNamePlus as: List ( ProjectName ; "No Selection" )
Then update your value list set up to draw values from cProjectNamePlus instead of ProjectName.
Very neat, thank you!
The additional entry seems to be added randomly either at the beginning or end of the resulting list. If I add a second additional value, the same happens to that, seemingly independently from the position of the first. Is there a way to force those entries to always appear at the beginning of the list? Sorting the value list doesn't seem to do it...
Field based value lists always sort their values in ascending order. To get the additional values at the top, you can change the values by using something like this:
All (Space precedes the A )
The leading character in all of these examples comes before a when sorting so they'll appear sorted above all other values that start with a normal letter of the alphabet.
Ah, indeed. Again, thanks a lot, I appreciate it.