If you choose to switch to hard-level 1 (easiest), you can have the longest (not yet filled in) answer word filled in - to help you get started (in case of emergency!).
NOTE: When you solve with a friend, your friend will be notified of each change in your hard-level!
To invite a friend to solve with, collaborate or compete, you must first agree on a suitable time and ask that the friend prepare beforehand.
Preparation for "friend WITH an iPhone or iPad":
-1 (if necessary) get an Apple ID/Apple account (do in Settings or at account.apple.com)
-2 (if necessary) log in with Apple ID (in Settings)
-3 download the Knax app from the AppStore
-4 start Knax, choose your own signature, open the solver window
-5 communicate the signature to the inviter
-6 accept your invitation
-------- End of preparation -----
Preparation for "friend WITHOUT an iPhone or iPad":
-1 choose a computer, tablet or mobile with a suitable screen and a sufficiently modern web browser
-2 (if necessary) get an Apple ID/Apple account (can be downloaded at account.apple.com)
-3 type the web address "knax.w3spaces.com" in a web browser tab ("web Knax")
-4 click the "Sign in..." button and type your Apple ID (.... and password...)
-5 choose your own solver signature
-6 communicate the signature to the inviter
-7 accept your invitation
-------- End of preparation -----
When your solver friend announces that it's time, you should click the "Letter button" at the bottom of the solver window.