Adjusting sensitivity of "keys" below track-pad.

[AlpineSkier]

Hello

.....my first foray into these waters , hopefully profitable

I have a Samsung RV520 and yesterday the keys below thw track-pad ( don't know if they have a special designation ) have become very unrersponsive/require a lot of pressure to click on a new page.

It is quite likely that I have altered something with my finger movements on the pad as I have only a small idea of how many diferent actions are possible.

I did a search for this but only found ways to alter the pad sensitivity and not the keys - hope you can help

Thanks in advance