sudo nano /usr/share/plasma/plasmoids/org.kde.plasma.timer/contents/ui/TimerView.qml change readonly property int digitH: ((height / 2) * digits < width ? height : ((width - (digits - 1)) / digits) * 2); to readonly property int digitH: 14 14 is the font size, change to any size you want. To add more timing: sudo nano /usr/share/plasma/plasmoids/org.kde.plasma.timer/contents/config/main.xml At line <default>30,60,120,300,450,600,900,1200,1500,1800,2700,3600</default> add any value in seconds To use dark theme, create folder /usr/share/plasma/desktoptheme/YOUR_THEME/widgets copy file /usr/share/plasma/desktoptheme/oxygen/widgets/timer.svgz