For instance, if I don't remember what worksheet some example is in, and I don't want those worksheets to move to the top, I'll often just open them, but not evaluate. But if there's an %auto cell, then they always update the time. Similarly, I can make as many changes in the TinyMCE stuff (comments between computation cells) as I want, and it never seems to update the time, even though I do save it.
For instance, if I don't remember what worksheet some example is in, and I don't want those worksheets to move to the top, I'll often just open them, but not evaluate. But if there's an %auto cell, then they always update the time. Similarly, I can make as many changes in the TinyMCE stuff (comments between computation cells) as I want, and it never seems to update the time, even though I do save it.