guoyunhe added a comment.
I checked all KCM modules, the bottom row of buttons are all in same height (like the smaller button in your screenshot). Have you tried reboot? REPOSITORY R31 Breeze REVISION DETAIL https://phabricator.kde.org/D25381 To: guoyunhe, #breeze, #plasma, ngraham Cc: ndavis, GB_2, ngraham, plasma-devel, LeGast00n, The-Feren-OS-Dev, jraleigh, fbampaloukas, ragreen, ZrenBot, alexeymin, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart