Some more KDE Connect goodness: during your presentations, use KDE Connect to move through your slides.
Or put your finger on the "Pointer", point your phone at the screen and a flaming circular pointer will appear. Higlight what you need by moving your phone.
This is such a cool idea! This is proof that Linux is an OS that loves showing its fun, useful, and creative side! Let's not forget that this feature can be used on computers and phones old and new as well!