[R] Looking for instructions for several questions with R

[Zheng Lu]

Dear all:

when I add legend into the upper right concer of the plot region, it 
always has a square region in which the text is, how to get rid of that 
square region, I just want pure text.

For the log-scale on y axis, they appear as 1e-02, 1e+00 and 1e+02, how 
to change to 0.01, 1, 100.

how to make label on axes bigger including number and text?

I appreciate your great consideration and help.

Lu