Empty placeholders in Arabic Marks

[michaelrafailyk]

Hello! Just started to get acquainted with the Arabic script using the guide from a Learn section, and faced the fact that diacritics in Basic Shapes do not have placeholders. Some of them are self-explanatory, but some others are not really. So it would be very desirable if these placeholders were added and displayed in a future if possible.

Especially I have problem with marks like twodotsvertical (above-ar/below-ar) – because I can’t find any case where they are used like a components. And marks like threedotsdown (above-ar/below-ar) – where it’s hard to understand what means down – like a pyramid or like an upside down pyramid?

Also, I would greatly appreciate it if someone could show a screenshot of these marks from your font file for visual reference. Thanks.

[mekkablue (Rainer Erich Scheichelbauer)]

Many of the double dots are variants for stylistic purposes only. You typically don’t need all of them.

[michaelrafailyk]

Thanks Rainer, it’s good to know.
Also, from guide, I found this picture that shade the light on three dots down/up marks.

Also, to keep everything in one place, here the related comment about the 3 latest marks from the Basic Shapes section.