I have several SLR's, and can figure out most. I just got a Nikkormat
FTN - a bargain I couldn't pass up - and I have figured out everthing
except how to set the film speed.

There is a scale on the bottom of the lens mount with what looks like
a sliding indicator, but I can't get it to move. Is there a trick,
might it be stuck, is there another way? I didn't want to force it!

I posted this on the rec.photo and got a couple of good answers, but nothing that's worked yet. I apologize if you've seen this question before. And if you answered me in the rec, you don't need to here!

Would posting a picture help?

Thanks in advance!!