What does the "U" button/letter mean in front of parameters in Archicad?

Tai ChenYi · ‎2025-09-04

In Archicad’s parameter list, every parameter seems to have a "U" shown in front of it (for example, before AC_show2DHotspotsIn3D).
What does this "U" stand for, and what is its function?

Thanks in advance for your help! 🙏

Barry Kelly · ‎2025-09-04

U = Unique.

From the reference manual ...

Barry.

One of the forum moderators.
Versions 6.5 to 27
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runxel · ‎2025-09-10

Caveat, beware!:

This is only true when you use the syringe inside the tool window to transfer settings between different objects, NOT while in the plan!

Lucas Becker | AC 29 on Mac (Sequoia) | Graphisoft Insider Panelist | Akroter.io – high-end GDL objects | Author of Runxel's Archicad Wiki | Editor at SelfGDL | Developer of the GDL plugin for Sublime Text

My List of AC shortcomings & bugs | I Will Piledrive You If You Mention AI Again |

POSIWID – The Purpose Of a System Is What It Does /// «Furthermore, I consider that Carth... yearly releases must be destroyed»

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Barry Kelly · ‎2025-09-04

U = Unique.

From the reference manual ...

Barry.

One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11

Tai ChenYi · ‎2025-09-10

Got it. So the point is to prevent that parameter from being passed to another object, like special marker text (e.g., the 'X' symbol explanation).
Thanks for clarifying!

runxel · ‎2025-09-10

Caveat, beware!:

This is only true when you use the syringe inside the tool window to transfer settings between different objects, NOT while in the plan!

Lucas Becker | AC 29 on Mac (Sequoia) | Graphisoft Insider Panelist | Akroter.io – high-end GDL objects | Author of Runxel's Archicad Wiki | Editor at SelfGDL | Developer of the GDL plugin for Sublime Text

My List of AC shortcomings & bugs | I Will Piledrive You If You Mention AI Again |

POSIWID – The Purpose Of a System Is What It Does /// «Furthermore, I consider that Carth... yearly releases must be destroyed»

Lingwisyer · ‎2025-09-11

That feels like a really bit caveat... I wonder why it is split like that...

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What does the "U" button/letter mean in front of parameters in Archicad?

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