KDE Frameworks 5.84 introduces a new user interface feature called expandable tooltips. This adds a “Press Shift for more” label to the tooltips in KDE apps that use the KXMLGui and Kirigami frameworks to display the longer text of that tooltip. The development is a replacement for the “What’s This?” feature.
This release also improves the clearing of global shortcuts for Plasma applets, improves the performance of SVG lookups in the Plasma desktop for a more responsive experience using fewer resources, fixes the most common crash in the Plasma calendar, and improves the appearance of tooltip shadows in the Plasma desktop.
Link to Article:
https://9to5linux.com/kde-frameworks-5-84-released-with-expandable-tooltips-performance-improvements