I remember reading one saying that is supposedly pretty old, can't rememeber where I heard it, but it sounds like good info, I think it maybe an old Bladesmith saying, it goes like this, "Forge it thick and grind it thin", personally( I am not an expert), I take mine to the point where I'm comfortable, where if I continue would be a mistake. Learning to stop once I got the shape or profile like I wanted, I've yet to be able to forge in the bevels, but that goes back to stopping before I messed up what I had. Once I transfer the idea in my head to the steel and I like it, I have a tendency to "try this", "try that" or "this might look cool, lets try it". Stopping that has saved more blades that I can count, I'm not saying I don't do that anymore, I just TRY to plan it before hand instead of changing my ideas midstream. I'm the worst about sticking to a plan, but when the steel starts talking to me, I get ideas that I just have to try, those voices could be the ones in my head though....
Seriously, you are getting great advice here, there are some that can forge a blade, bevels and all to the point that there is very little grinding left, they usually have a power hammer to help with that, I would say keep working on doing as much with the hammer, until you get to the point of messing up, find that spot and stop there. Remember there is a lot that can be done with light blows when working the bevel in. And also remember your own limitations, I can't hammer for hours on end, never have been able to, my arm goes to rubber after about hour or so, then there is nothing but mistakes to be done at that point. Wild blows from the hammer, weird angles of the head because I can't control the hammer at that point, stopping when I get to that point has helped a lot as well. Of course when I get my NEW TIRE HAMMER (yeah, I'm excited), it will all change, except the learning! That never stops!!! I think a picture might be a misinterpretation of what you can or should do. New makers should take the advice above, get with an experienced Smith, tell us where you are, I'd bet there is someone close you haven't heard of and if your close to me you ALL have an open invitation to my shop!.....errr let me finish with the renovation first, not much knife making been going of late! But if you are in my area, come on, I'd stop what I'm doing if I can and we'll make a kinfe or 2...or 3 ...or ...
Thanks, Rex