Hi Tony, When you inspect $:/themes/tiddlywiki/vanilla/base you will see 13 times z-index has been used (with sometimes high values).
Below summarized the class that uses a z-index + the value used: class z-index .tc-tiddler-dragger -10000 .tc-dropzone.tc-dragover:before 10000 .tc-plugin-reload-warning 1000 .tc-topbar 1200 .tc-block-dropdown 1000 .tc-modal-wrapper 900 .tc-modal-backdrop 1000 .tc-modal 1100 .tc-notification 1300 .tc-tab-buttons.tc-vertical 100 .tc-alerts 20000 .tc-static-alert-inner 100 .tc-tabbed-table-of-contents .tc-table-of-contents 100 Cheers, Ton -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To post to this group, send email to tiddlywiki@googlegroups.com. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/bce0c35d-7861-4e6d-beff-8463247c6f09%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.