Created attachment 201357 [details] Screenshot Bullets and Numbering and List Style contain Ordered, Unordered, Outline and Image tabs with GtkScrolledWindow as root item. The content is minimized when using vertical tabs for the SfxTabDialog. cui/ui/pickbulletpage.ui cui/ui/pickgraphicpage.ui cui/ui/picknumberingpage.ui cui/ui/pickoutlinepage.ui
OK, so the preview handling needs to be reworked to also appear when in vertical mode. You show List Style: Numbering in the clip, but would affect *any* of the preview panels on the 'Bullets and Numbering...' dialog: Unorderd, Ordered, Outline, Image; and what of the generated "preview" in the Position and Customize tabs?
https://gerrit.libreoffice.org/c/core/+/187054 seems to help here
Caolán McNamara committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/cea043999aa55b9ac118bee26cd97cecee909901 tdf#167114 set the host grids for the numbering pages to expand It will be available in 26.2.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.