As we have seen earlier, there are a number of different ways which typewriter manufacturers denoted a key as being for margin-release, to let the margins be overrided. Here are two more variants.
The Triumph-Adler Tippa uses a simple double-ended arrow to show that the margins can be exceeded. A nice solution though perhaps some ambiguity for new users.
The Adsit Graduate though has decided to keep it as simple and straight forward as possible and just mark a key with M-R!
