shortcut questions

sorry abotu the thread assault, I only really get these questions during actual paid sessions lol

are there shortcuts for

1. show/hide take lanes for selcted tracks. 
2. mute last take... this is a big one because when you do not have take lanes open or even when you do, you have to go thru a bunch to pick the last recorded
3. hide all take lanes


also. when i am editing something confusing is happening. 

sometimes when i press spacebar it stops the cursor where it was, and sometimes it goes back to the last place i put it.... any ideas here? seems buggy...


and

how do i make a certain take the active take that shows in the main lane when take lanes are closed.