how do you check/add gear oil?

[1jimmy__d]

just wondering how to do this and where it is located. getting the shifter into gear has been not so smooth since ive owned tha car. it seems to go in with 2 pushes, like a cl;ick click, but tihs no sound(if that makes sense). it is probably the syncros, but would gear oil affect that too? If so, how do i check and add if needed oil? I ned the steps broken down for a 2 year old if possible! thanks,

jim