Parameter calls
Top a certain process by PID
top -p PID
Top a certain user
top -u user
Runtime commands
f choose fields listed
o changes the display order
O change the sort by column
<> move sort field
R normal/reverse sorting
H show threads
c command name / full command line
i idle/running
S cumulative time
x highlight sort field
y highlight running threads
z toggle color/mone
b toggle highlight
u show specific user only
k send signal to a process
r renice a process
M sort by memory usage
P sort by CPU usage
d delay
W write config file
q quit