Use editbox

src/freedombone-controlpanel-user

 function add_gpg_key {
     data=$(tempfile 2>/dev/null)
     trap "rm -f $data" 0 1 2 5 15
-    dialog --title $"Add someone's PGP/GPG key" \
+    dialog --title $"Enter email address, Key ID or full key below" \
            --backtitle $"Freedombone User Control Panel" \
-           --inputbox $"Enter their email address, Key ID or full key below" 8 999999 2>$data
+           --editbox $data 8 60
     sel=$?
     case $sel in
         0)
                     address_is_valid=1
                 fi
 
-
                 if [ $address_is_valid ]; then
                     clear
                     if [[ "$ADD_EMAIL_ADDRESS" == *"$publicstr"* ]]; then
             fi
             ;;
     esac
+    rm $data
 }
 
 function remove_gpg_key {