As you also can't upload JS or CSS Files here, make sure they are included in the HTML
Key Combos 
These only work in the presentation


Ctrl + Shift + Alt + H | Hide-toggle the cursor (not while Laserpointer)

Ctrl + Shift + Alt + P | Page-Switch; Switch to a specific page

Ctrl + Shift + Alt + B | Block the page switch manually (toggler)

Ctrl + Shift + Alt + L | Laserpointer-toggler

DoubleClick            | One click doesn't work to switch? Try this and again