# Symbols still in usage or replaced by others?

Tue Jun 24 02:25:47 UTC 2014

```To answer your first question, as Stefan so quickly replied to, yes these are all used. They do not mean the same thing, however. Before I get into the first set, which is talking about rotations, I will explain the arrows themselves. I’m sure you know the circle arrows below:

Notice how the first one is on the wall plane. The second is a vertical circle that is intercepting with the floor plane and wall plane. Now let’s break these circles into quarter arrows. We get this configuration:

As you notice, several of the arrows that you asked about are in the vertical circle broken into quarters. Do you see how they are different now?

Now let’s go back to your first set, the rotations. Imagine your arm rotating on a axis along the rotation line moving in the direction of the arrows. They are not the same either.

Now your next question asks how do you know if the rotation is by 90 or 180 degrees. You don’t really know from the symbol themselves. They weren’t meant to be that specific because most people don’t usually see a difference in mean by that much. If someone wishes to make that distinction clear, they can write the before and after handshape. It is for this reason that you will not usually see 1A.

For 6 and 7, I will use the wall plane equivalent to show how the movement is on the vertical plane that intercepts the wall and floor plane. Imagine that the arrow is moving away from you rather than moving across and you will have the correct movement.

On Jun 23, 2014, at 3:13 PM, André L <andre-andre at HOTMAIL.CA> wrote:

>
>   Hello,
> I would like to know if the following symbols from 1-A to 4-A are still in usage or if they are replaced by 1-B to 4-B?
>
> In 5, how do I know if the hand rotates by 90 degrees or 180 degrees?
> In 6, does the sign Forward Under Under has a small backward movement?
>
> In 7, I do not understand the Forward-over-Under symbol.  What is the sequence of direction changes?
>
> Thanks
> André Lemyre
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