# TTT Today by Miklos Vajna " Writer UI - undo/redo, layout update, invalidations"

**URL:** <https://forum.collaboraonline.com/t/ttt-today-by-miklos-vajna-writer-ui-undo-redo-layout-update-invalidations/4538>\
**Category:** News\
**Tags:** ttt\
**Created:** [March 20, 2026, 7:55am UTC](https://forum.collaboraonline.com/t/ttt-today-by-miklos-vajna-writer-ui-undo-redo-layout-update-invalidations/4538 "2026-03-20T07:55:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Laserford09](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.collaboraonline.com/laserford09/32/1869_2.png) [@Laserford09](https://forum.collaboraonline.com/u/Laserford09)\
**Post date:** [March 20, 2026, 7:55am UTC](https://forum.collaboraonline.com/t/ttt-today-by-miklos-vajna-writer-ui-undo-redo-layout-update-invalidations/4538/1 "2026-03-20T07:55:04Z")

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Today TTT at 13 CET timezone

Topic: Writer UI - undo/redo, layout update, invalidations by @vmiklos

You can join via this link [Jitsi Meet](https://meet.jit.si/Fri-TTT-CPTEAM)

The overall Training time =\> 15-45 mins

Please note that the session is recorded and published in our Youtube channel [https://www.youtube.com/@CollaboraOnlineTechTalks](https://www.youtube.com/@CollaboraOnlineTechTalks)