Yes. I saw that in the preview window we could see the animation frame by frame. I just think it would be useful to check each frame before going to the rendering tab.
For the pause, the Delay option would do the exact opposite of what I want. ^^ Let me explain my idea a little more. For a specific effect, we need to control the precise moment it starts. This has no consequence when we use only one emitter but when we combine many, the timing is essential. So the Delay option is quite useful to control each emitter separately. What I'd really appreciate is to have an option to add empty frames at the end of the animation, so when repeating, I could see when the animation starts and when it ends. At the moment, when repeating, there is nearly no gap between the end of the current animation and the following one. It's a little confusing. You will tell me that I could disable repeat and start the animation by hand but it's really useful to keep tweaking while it's playing in loop. Anyway, those are just small details. I just thought you might like to know them.