# Scaling to a new UPM doesn’t scale vertical metrics

**URL:** <https://forum.glyphsapp.com/t/scaling-to-a-new-upm-doesn-t-scale-vertical-metrics/37482>\
**Category:** Glyphs\
**Created:** [October 19, 2026, 1:14pm UTC](https://forum.glyphsapp.com/t/scaling-to-a-new-upm-doesn-t-scale-vertical-metrics/37482 "2026-10-19T13:14:27Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Ludwig](https://forum.glyphsapp.com/user_avatar/forum.glyphsapp.com/ludwig/32/2095_2.png) [@Ludwig](https://forum.glyphsapp.com/u/Ludwig)\
**Post date:** [October 19, 2026, 1:14pm UTC](https://forum.glyphsapp.com/t/scaling-to-a-new-upm-doesn-t-scale-vertical-metrics/37482/1 "2026-10-19T13:14:27Z")

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When I scale the UPM in Glyphs 4 (e.g. from 2048 to 1000), the custom parameters, particularly the vertical metrics, don’t get scaled along with it. This used to work in Glyphs 3.