Proportional editing is not working Yes I know there's many questions on this answered already but nothing has worked for me. Proportional editing both on object and edit mode is not working for me. I am using my laptop keyboard and my wacom tablet.

When in object mode, I enable proportionAl editing set to smooth, pivot point on median,scale my object on the z axis ,sphere appears, then when I scaLe while pressing Pgdn and PgUp both on arrow buttons and numpad buttons, the sphere does not decrease or increase only the object does.

And then when I try using it on edit mode, repeating the same steps as above, the vertices only move and nit the actual sphere itself 

When I press the numpad PgUp and Pgdn it moves the vertices like 5 times more like so

This is how my keyboard looks like
The PgDn and PgUp are secondary functions on your laptop keyboard.
Related: On laptop when I press F3, no search bar shows up, just the brightness goes up?

You need to hold the Fn key to make them work.
Or you can use the pop-up menu slider.