If you’re on a PC, you can use a little AutoHotKey script I wrote to give live previews in locked views:
#MaxHotkeysPerInterval 100
SetTitleMatchMode 2
SendMode Play
#IfWinActive Adobe After Effects ; while AE is in foreground
$Tab::
while GetKeyState("Tab", "P") ; While the Tab key is being held down
{
Send {Click Up} ; release left mouse button
sleep 1 ; wait 1ms
Send {Click Down} ; click left mouse button
}
Send {Click Up} ; make sure mouse releases when Tab is released
return
Save that as any .ahk file (ae_locked_view_scrubber.ahk, etc), or you can download it from a link I saved here:
https://www.dropbox.com/s/umbh7vm9rd4evvq/ae_locked_view_scrubber.ahk
Then install AutoHotKey (https://www.autohotkey.com/), and just double-click the .ahk file. (When running it should put a little “H” icon in your tray… to close it right-click that H and choose Exit.)
Now, when you want to see the scrubbing in a locked view, hold down Tab while scrubbing, then release your mouse button, and as long as Tab is held down, it’ll be “flashing” your mouse button every 1ms, thus faking you tapping the button really fast, THUS allowing you to see the scrubbing in the locked view. 🙂
Let me know if this works for you. It works great here on Win 7 Pro 64-bit. If you’re on Mac, perhaps there is a hotkey/scripting program where you could do something similar. It’s too bad AE doesn’t let you scrub those locked views by default!