Changes

After safeing the page, the chart could be edited by a graphical UI (you can't edit the chart while editing the page):

After safeing the page, the chart could be edited by a graphical UI (you can't edit the chart while editing the page):

{{#drawio:ChartTitle|type=svg}}

{{#drawio:ChartTitle|type=svg}}To make text labels visible on the wiki page preview, select all elements and disable "Word Wrap" and "Formatted Text" in the Text Settings.