[jfrancis]

I find the use of the word 'restart' somewhat confusing. If I pause something, and I want to resume it, I might just as often call that 'restarting' it.

I suggest "Start" and "Resume," or maybe "Initiate" and "Resume." Or "Start" and "Continue."

I'm not sure "Restart" and "Resume" make a good pair.

Just my two cents.

[feynman]

Restart implies to begin anew from the start. Resume implies to pick up where paused or stopped. Makes sense to me : )

[jfrancis]

And that is one definition of restart. But there is another which makes it a synonym to resume.

http://www.merriam-webster.com/dictionary/restart

Maybe it could say "Resume from SL: 12.74" (or whatever is current SL) vs "Restart from SL: 0.00"

Then it would be unambiguous.