I realise that I can only specify once an entity's length.
After doing so once, if I select another entity (let's say a line), select the entity information, write a value in the length field, and the value shows but doesn't apply. I try closing the entity info windows, re opening it, the old value is again. The only workaround I found was to completely shut the application, thenm re open it which allows me to successfully change the length of one entity then I have to close the app again.
Any idea anyone?