# Create Easy Chart Pen Tags From UDT in Template

**URL:** <https://forum.inductiveautomation.com/t/create-easy-chart-pen-tags-from-udt-in-template/109096>\
**Category:** Ignition\
**Tags:** ignition81, vision\
**Created:** [July 29, 2025, 5:52pm UTC](https://forum.inductiveautomation.com/t/create-easy-chart-pen-tags-from-udt-in-template/109096 "2025-07-29T17:52:42Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![lrose](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/lrose/32/62724_2.png) [@lrose](https://forum.inductiveautomation.com/u/lrose)\
**Post date:** [July 30, 2025, 6:00pm UTC](https://forum.inductiveautomation.com/t/create-easy-chart-pen-tags-from-udt-in-template/109096/14 "2025-07-30T18:00:23Z")

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> [@tbennett.tdc](#):
>
> What makes a UDT different than other tag types?

Mainly, a UDT isn't a tag, it's a type. And that can be a performance killer if you have large UDT's or you have many bindings to smaller UDT's.

Here is an applicable topic:

> [@Template using UDT param: Can you access UDT tag metadata?](https://forum.inductiveautomation.com/t/template-using-udt-param-can-you-access-udt-tag-metadata/10179):
>
> Hi all, I’m new to Ignition and have tried searching for this already with no luck. I have a template with a UDT as a parameter that contains some OPC tags. Can I access the metadata (e.g. Eng Units / Min/Max range, etc.) of this UDT parameter’s tags from inside the template? e.g. something like (which doesn’t work) {Tank Template.Tank::Temperature.PV.EngHigh} Where: Tank Template is the template Tank is the UDT parameter Temperature.PV is an OPC tag within the UDT EngHigh is the metadata…

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