[RWP] a few audio edit questions if possible

[Justin Thornton]

hi
I understand how to use reaper for basic multitrack recording but have some audio editing questions
1. where can I find the short cut to split items across all tracks to change it to just split items on the current track I'm working on?
2. what is the best way to split an item and cut a portion e.g silence from a track?
3. how if possible can i speed up the scrubbing with the arrow keys?
4. what is the best way to use a compressor and reverb for starters?
5. using asio for all, I have trouble when trying to connect to USB audio devices to use multiple inputs for multitrack live recording.
Can this be fixed somehow tried adjusting the buffer output.
thanks for reading and taking the time to answer my questions.
take care JT