Github user mcgilman commented on the issue: https://github.com/apache/nifi/pull/2394 The change should be pretty straight forward. Here is an example of setting the title on the SVG elements [1]. In this example however, the tooltip is dynamic and needs to be regularly updated. Your tooltips will be not be changing based on the configuration so you only need to set them when those elements are appended starting here [2]. [1] https://github.com/apache/nifi/blob/master/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/canvas/nf-process-group.js#L1195 [2] https://github.com/apache/nifi/blob/6153fb64655701f7bfdaadfe1ff7c8def111422c/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/js/nf/canvas/nf-process-group.js#L304
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