I feel kinda dumb asking this first question since it's so basic and I feel like I should know how to do it, I've managed long enough without knowing how to do it since all I technically have to do is either select undo or put tiles over where I make a mistake, but for some reason the delete key doesn't seem to do anything. I know it's not my computer because the delete button is greyed out and unusable. What am I doing wrong?
My second question is also very basic, I've seen a person on youtube actually drag tiles that he put down to other places on the map, but I don't know how to do that either. Is this even possible or was I just seeing things wrong? I asked him how he did it but he said he forgot because it was apparently a while since he did it, but it seems like a very basic thing to do.