merge 5 TTF to 1 TrueType Collection

Hello

I use FC5.0 for extract TrueType Collection and edit any TTF.

And now, I want to merge 5 TTF to 1 TrueType Collection, but I don’t know the method.(ttf to ttc )

Please suggest me the method.

Thank you.

Not possible in Font Creator. Extract only.

Thank you for your answer.

Please suggest me for this problem, if you know. Do you have any method for this problem? or another tool or coding program.

Thank you.